Exhibit 4 Page 1 of 6

$85.00 (10.53) $100.00 66.67 Other Price Sources N2113654B1 awarded 8/22/17 T1368213B1 awarded 1/19/16 G1298502B1 awarded 6/15/15 J1387002B1 awarded 7/6/16 J1387002B1 awarded 7/6/16 J1387002B1 awarded 7/6/17 G1298502B1 awarded 6/15/15 Page 1 of 6 > 20 lower than LRB > 20 higher than LRB = or > 100 higher than LRB LRB, Unit Price BLD2114202B1--02-01 MOT: Traffic Control Officer 120 hour $95.00 $75.00 (21.05) $60.00 (36.84) BLD2114202B1--02-02 MOT: Work Zone Signs F&I 30 day $0.60 $1.10 83.33 $1.75 191.67 BLD2114202B1--02-03 MOT: Barrier Wall Temporary 1000 linear foot $5.50 $7.00 27.27 MOT: Barrier Wall Temporary BLD2114202B1--02-04 Low Profile 1000 linear foot $5.50 $7.00 27.27 BLD2114202B1--02-05 $0.75 25.00 MOT: Portable Changeable Message Sign 10 each $60.00 $75.00 25.00 $40.00 (33.33) BLD2114202B1--02-06 MOT: Portable Regulatory Sign 10 each $60.00 $75.00 25.00 $60.00 0.00 BLD2114202B1--02-07 BLD2114202B1--02-08 BLD2114202B1--02-09 BLD2114202B1--02-10 BLD2114202B1--02-11 BLD2114202B1--02-12 BLD2114202B1--02-13 BLD2114202B1--02-14 Install Single Fiber Cable Existing Conduit of One Fiber Cable 100000 linear foot $1.00 $1.50 50.00 Install Fiber Cable Existing Conduit of Two Fiber Cable 20000 linear foot $1.45 $1.65 13.79 Install Fiber Cable Existing Conduit of Three Fiber Cable 5000 linear foot $1.75 $1.75 0.00 Install Single Fiber Cable New Conduit 150000 linear foot $1.00 $1.50 50.00 Install Two Fiber Cable New Conduit 20000 linear foot $1.45 $1.65 13.79 12 Strand Armored Fiber Cable Corning Altos Lite or Equal 3000 linear foot $1.25 $0.45 (64.00) $1.34 7.20 24 Strand Armored Fiber Cable Corning Altos Lite or Equal 3000 linear foot $2.10 $0.50 (76.19) $2.24 6.67 36 Strand Armored Fiber Cable Corning Altos Lite or Equal 100000 linear foot $0.65 $0.60 (7.69) $0.67 3.08

Page 2 of 6 > 20 lower than LRB > 20 higher than LRB = or > 100 higher than LRB LRB, Unit Price BLD2114202B1--02-15 BLD2114202B1--02-16 BLD2114202B1--02-17 BLD2114202B1--02-18 BLD2114202B1--02-19 BLD2114202B1--02-20 BLD2114202B1--02-21 BLD2114202B1--02-22 BLD2114202B1--02-23 BLD2114202B1--02-24 BLD2114202B1--02-25 BLD2114202B1--02-26 48 Strand Armored Fiber Cable Corning Altos Lite or Equal 25000 linear foot $0.70 $0.75 7.14 96 Strand Armored Fiber Cable Corning Altos Lite or Equal 3000 linear foot $1.15 $1.20 4.35 144 Strand Armored Fiber Cable Corning Altos Lite or Equal 3000 linear foot $1.50 $1.75 16.67 $1.85 23.33 Closet Connector Housing Corning or Equal 10 each $195.00 $194.99 (0.01) Closet Connector Housing Corning or Equal 10 each $225.00 $224.99 (0.00) Closet Connector Housing Corning or Equal 10 each $275.00 $298.99 8.72 Closet Connector Housing Panels Corning or Equal 10 each $75.00 $79.99 6.65 Closet Connector Housing Panels Corning or Equal 10 each $185.00 $214.55 15.97 Closet Connector Housing Panels Corning or Equal 10 each $98.00 $87.99 (10.21) SC Fiber Connector Single Mode Corning or Equal 300 each $15.25 $15.50 1.64 $19.25 26.23 SC Fiber Connector Multi-Mode 50 Corning or Equal 150 each $13.50 $14.00 3.70 $17.32 28.30 SC Fiber Connector Multi-Mode 62.5 Corning or Equal 150 each $9.50 $9.50 0.00

Page 3 of 6 > 20 lower than LRB > 20 higher than LRB = or > 100 higher than LRB LRB, Unit Price BLD2114202B1--02-27 BLD2114202B1--02-28 BLD2114202B1--02-29 BLD2114202B1--02-30 BLD2114202B1--02-31 Fiber Closure Kit Coyote Runt or Equal 20 each $146.50 $150.00 2.39 $163.09 11.32 Fiber Splice Tray Coyote Runt or Equal 60 each $27.50 $30.00 9.09 $28.71 4.40 Fiber Closure Coyote PUP or Equal 20 each $240.00 $220.00 (8.33) Spider Fan Out Kit 6 Fiber Corning or Equal 50 each $15.25 $55.00 260.66 $17.48 14.62 Spider Fan Out Kit 12 Fiber Corning or approved equal 50 each $15.75 $75.00 376.19 $17.91 13.71 BLD2114202B1--02-32 Splice Case 3M or Equal 10 each $300.00 $305.88 1.96 BLD2114202B1--02-33 Water-Blocked Tube Cable 4 Tubes Sumitomo FutureFlex or Equal 1000 linear foot $2.00 $3.15 57.50 $2.00 0.00 BLD2114202B1--02-34 BLD2114202B1--02-35 BLD2114202B1--02-36 BLD2114202B1--02-37 BLD2114202B1--02-38 Water-Blocked Tube Cable 7 Tubes Sumitomo FutureFlex or Equal 10000 linear foot $2.50 $4.00 60.00 $2.60 4.00 Water-Blocked Tube Cable 19 Tubes Sumitomo FutureFlex or Equal 1000 linear foot $5.75 $7.00 21.74 $5.34 (7.13) Plenum OFNP Rated Tube Cable 2 Tubes Sumitomo FutureFlex or Equal 1000 linear foot $2.35 $3.75 59.57 $2.32 (1.28) Plenum OFNP Rated Tube Cable 4 Tubes Sumitomo FutureFlex or Equal 1000 linear foot $4.00 $4.95 23.75 $3.60 (10.00) Plenum OFNP Rated Tube Cable 7 Tubes Sumitomo FutureFlex or Equal 1000 linear foot $7.95 $8.75 10.06 $7.11 (10.57)

Page 4 of 6 > 20 lower than LRB > 20 higher than LRB = or > 100 higher than LRB LRB, Unit Price Outdoor/Indoor Rated Tube Cable 4 Tubes Sumitomo BLD2114202B1--02-39 FutureFlex or Equal 1000 linear foot $5.25 $6.50 23.81 $4.71 (10.29) BLD2114202B1--02-40 Outdoor/Indoor Rated Tube Cable 7 Tubes Sumitomo FutureFlex or Equal 1000 linear foot $5.50 $6.95 26.36 $5.03 (8.55) BLD2114202B1--02-41 BLD2114202B1--02-42 BLD2114202B1--02-43 BLD2114202B1--02-44 BLD2114202B1--02-45 BLD2114202B1--02-46 BLD2114202B1--02-47 BLD2114202B1--02-48 BLD2114202B1--02-49 BLD2114202B1--02-50 BLD2114202B1--02-51 BLD2114202B1--02-52 Fiber Bundles-Single Mode Fiber 12 fibers Sumitomo or Equal 2000 linear foot $1.15 $1.50 30.43 $1.14 (0.87) Fiber Bundles-Single Mode Fiber 24 fibers Sumitomo or Equal 2000 linear foot $2.15 $2.25 4.65 $2.15 0.00 Fiber Bundles Multi-Mode Fiber 50 12 Fibers Sumitomo or Equal 500 linear foot $2.60 $2.95 13.46 $3.35 28.85 Fiber Bundles Multi-Mode Fiber 12 Fibers Corning Altos or Equal 2000 linear foot $1.05 $5.25 400.00 $1.34 27.62 Fiber Bundles Multi-Mode Fiber 24 Fibers Corning Altos or Equal 2000 linear foot $1.75 $9.75 457.14 $2.24 28.00 Installation of Air Blown Fiber Bundles 10000 linear foot $1.25 $5.00 300.00 Directional Bore for One-(1) 2 inch Pipe (450 ft. or more) 30000 linear foot $11.75 $11.75 0.00 Directional Bore for Two-(2) 2 inch Pipe (450 ft. or more) 3500 linear foot $14.00 $13.75 (1.79) $17.00 21.43 Directional Bore for Three-(3) 2 inch Pipe (450 ft. or more) 2500 linear foot $16.00 $15.50 (3.13) $18.00 12.50 Directional Bore for One-(1) 2 inch Pipe (Less than 450 ft.) 5000 linear foot $12.75 $12.85 0.78 Directional Bore for Two-(2) 2 inch Pipe (Less than 450 ft.) 3500 linear foot $15.00 $14.50 (3.33) $17.00 13.33 Directional Bore for Three-(3) 2 inch Pipe (Less than 450 ft.) 1000 linear foot $17.00 $16.25 (4.41) $18.00 5.88

Z1106602B1 awarded 12/2/14 M1427801B1 awarded 11/1/16 $450.00 (10.00) T1368213B1 awarded 1/19/16 M1427801B1 awarded 11/1/16 Page 5 of 6 > 20 lower than LRB > 20 higher than LRB = or > 100 higher than LRB LRB, Unit Price Directional Bore for One-(1) 4 BLD2114202B1--02-53 inch Pipe (450 ft. or more) 2000 linear foot $15.50 $14.75 (4.84) Directional Bore for Two-(2) 4 BLD2114202B1--02-54 inch Pipe (450 ft. or more) 2000 linear foot $22.00 $19.95 (9.32) Directional Bore for One-(1) 4 BLD2114202B1--02-55 inch Pipe (Less than 450 ft.) 2000 linear foot $18.00 $17.25 (4.17) Directional Bore for Two-(2) 4 BLD2114202B1--02-56 inch Pipe (Less than 450 ft.) 2000 linear foot $26.50 $24.50 (7.55) BLD2114202B1--02-57 Missile Bore 500 linear foot $15.00 $15.50 3.33 Asphalt Cut Removal & BLD2114202B1--02-58 Restoration (2 inch) 500 square foot $12.00 $9.75 (18.75) Asphalt Cut Removal & BLD2114202B1--02-59 Restoration (4 inch) 500 square foot $14.50 $13.75 (5.17) Underground Access Structure BLD2114202B1--02-60 (Manhole) Precast (concrete) 5 each $6,350.00 $7,400.00 16.54 $7,480.00 17.80 BLD2114202B1--02-61 BLD2114202B1--02-62 BLD2114202B1--02-63 BLD2114202B1--02-64 BLD2114202B1--02-65 BLD2114202B1--02-66 Quazite Tier 15 Pull Box 24x36x30 5 each $1,300.00 $1,550.00 19.23 Quazite Tier 15 Pull Box 48x48x36 5 each $2,200.00 $2,450.00 11.36 Quazite Tier 15 Pull Box 36x60x36 20 each $1,900.00 $2,000.00 5.26 Precast Polymer Concrete Pull Box 24x36x30 5 each $1,150.00 $1,150.00 0.00 Precast Polymer Concrete Pull Box 36x60x36 5 each $1,550.00 $1,550.00 0.00 Precast Polymer Concrete Pull Box 48x48x36 5 each $1,950.00 $1,950.00 0.00 BLD2114202B1--02-67 2" Galvanized Ridgid Conduit 100 linear foot $55.00 $100.00 81.82 $20.99 (61.84) BLD2114202B1--02-68 Mobilization Regular Hours 3 each $500.00 $450.00 (10.00) $600.00 20.00 BLD2114202B1--02-69 Mobilization Other Hours 3 each $800.00 $750.00 (6.25) $600.00 (25.00) BLD2114202B1--02-70 Sod Replacement 1000 square foot $1.75 $2.00 14.29

$95.00 (9.52) Other Price Sources T2111251B1 awarded 10/4/16 Y1284708B1 awarded 1/27/15 N2113654B1 awarded 8/22/17 V1311511B2 awarded 10/10/17 V2113566B1 awarded 6/12/17 N2113654B1 awarded 8/22/17 Page 6 of 6 > 20 lower than LRB > 20 higher than LRB = or > 100 higher than LRB LRB, Unit Price BLD2114202B1--02-71 Trenching 1000 linear foot $9.50 $9.00 (5.26) BLD2114202B1--02-72 Optical Fiber Splices 500 each $32.50 $35.00 7.69 BLD2114202B1--02-73 Fiber Termination 500 each $17.50 $25.00 42.86 BLD2114202B1--02-74 Concrete Sidewalk Removal and Replacement 50 each $1,200.00 $950.00 (20.83) BLD2114202B1--02-75 Backhoe with Operator Regular Hours 100 hour $105.00 $85.00 (19.05) $99.00 (5.71) BLD2114202B1--02-76 BLD2114202B1--02-77 BLD2114202B1--02-78 BLD2114202B1--02-79 BLD2114202B1--02-80 BLD2114202B1--02-81 $75.00 (28.57) Backhoe with Operator Other Hours 100 hour $175.00 $145.00 (17.14) Fiber Splice Technician Regular Hours 200 hour $38.50 $40.00 3.90 Fiber Splice Technician Other Hours 100 hour $56.50 $60.00 6.19 Additional Labor (Unskilled) Regular Hours 200 hour $32.00 $32.00 0.00 $50.00 56.25 $40.00 25.00 Additional Labor (Unskilled) Other Hours 200 hour $48.00 $48.00 0.00 $45.00 (6.25) Professional Services- Engineering Permit Drawings 10000 linear foot $1.95 1) No other governmental contracts found of similar open-end term scope of work. 2) There has been a 1.82 increase in the Consumer Price Index (CPI) for labor since the prior contract was awarded in 2014, which relates to all hourly line items. 3) There has been a 10.76 increase in CPI for Other Goods and Services in the Miami-Ft. Lauderdale area since the prior contract was awarded in 2014.