Based on the price tables provided by the vendors, the total cost of the contract can be estimated. For Herman's Trucking, Inc., the total cost is $82,875.00 for 1,500 tons of Riprap Slope Protection 4" Stone, $27,625.00 for 500 tons of Riprap Slope Protection (Class 1 Amended), and $110,500.00 for 2,000 tons of Riprap Slope Protection (Class II). For Stavola Construction Materials, Inc., the total cost is $69,000.00 for 1,500 tons of Riprap Slope Protection 4" Stone, $43,000.00 for 500 tons of Riprap Slope Protection (Class 1 Amended), and $172,000.00 for 2,000 tons of Riprap Slope Protection (Class II). Therefore, the estimated total value of the contract is $82,875.00 + $27,625.00 + $110,500.00 + $69,000.00 + $43,000.00 + $172,000.00 = $504,000.00.