The contract value can be estimated based on the prices provided by the vendors. For example, Mansfield's price for diesel for deliveries over 4,000 gallons is $8,568.00, and their price for unleaded gasoline for deliveries over 4,000 gallons is $18,060.00. Silvas' price for diesel for deliveries under 4,000 gallons is $8,330.00, and their price for unleaded gasoline for deliveries under 4,000 gallons is $18,690.00. Assuming an average annual consumption of 100,000 gallons of diesel and 200,000 gallons of unleaded gasoline, the total contract value can be estimated as follows: - Mansfield's price for diesel: 100,000 gallons x $0.1224 per gallon = $12,240.00 per year - Mansfield's price for unleaded gasoline: 200,000 gallons x $0.086 per gallon = $17,200.00 per year - Silvas' price for diesel: 100,000 gallons x $0.119 per gallon = $11,900.00 per year - Silvas' price for unleaded gasoline: 200,000 gallons x $0.089 per gallon = $17,800.00 per year The total contract value would be around $58,140.00 per year for Mansfield and $49,700.00 per year for Silvas. Since the contract duration is not specified, it is difficult to provide an exact estimate of the contract value. However, based on the prices provided, it can be estimated that the contract value would be around $50,000 to $100,000 per year.