Based on the estimated annual quantities and unit prices listed in the contract, the total value of the contract can be estimated. For SCHEDULE A, the estimated annual quantity is 8,000 tons, and the unit price is not specified. For SCHEDULE B, the estimated annual quantities are 250 tons and 100 tons, and the unit prices are not specified. For SCHEDULE C, the estimated annual quantities are 500 tons and 250 tons, and the unit prices are not specified. Assuming an average unit price of $20 per ton, the total estimated value of the contract would be: SCHEDULE A: 8,000 tons * $20 per ton = $160,000 per year SCHEDULE B: 250 tons * $20 per ton = $5,000 per year, and 100 tons * $20 per ton = $2,000 per year SCHEDULE C: 500 tons * $20 per ton = $10,000 per year, and 250 tons * $20 per ton = $5,000 per year The total estimated value of the contract for one year would be: $160,000 + $5,000 + $2,000 + $10,000 + $5,000 = $182,000 per year For a five-year period, the total estimated value of the contract would be: $182,000 per year * 5 years = $910,000