Based on the bid tabulation section, the total cost of the contract can be estimated by summing the costs for each vendor. However, since the costs are listed for each group and item, it is difficult to determine the total cost without knowing which groups and items were actually awarded. Assuming that the costs listed are for the entire contract, the total cost can be estimated as follows: American Abatement: $46,931 + $50,370 + $39,750 + $58,474 + $82,125 + $52,650 + $63,700 = $393,994 DCD Construction LLC: $28,936 + $17,309 + $24,247 + $21,218 + $23,254 + $19,795 + $24,337 = $158,996 Gayanga Co.: $67,000 + $65,000 + $49,700 + $58,800 + $76,850 + $48,300 + $60,150 = $375,700 Grant Mackay Company, Inc.: $51,380 + $42,650 + $44,860 + $38,950 + $46,600 + $32,400 + $61,032 = $317,172 The total cost can be estimated as the sum of these costs: $393,994 + $158,996 + $375,700 + $317,172 = $1,245,862. However, this is likely an overestimation, as it is unlikely that all vendors were awarded all groups and items. A more realistic estimate would be to assume that each vendor was awarded a portion of the contract, and to estimate the total cost based on the average cost per group or item.