Based on the contract document, the total value of the contract can be estimated by calculating the total cost of the items listed. For Trap Rock Industries LLC, the total cost is $75,375 + $51,200 + $56,362.50 + $15,875 = $198,812.50. For Stavola Construction Materials, Inc., the total cost is $81,562.50 + $55,500 + $60,187.50 + $13,875 + $18,125 = $229,250. For Herman's Trucking, Inc., the total cost is $75,375 + $59,000 + $64,125 + $16,750 + $14,900 + $14,375 = $244,425. The total value of the contract is approximately $672,487.50.