The estimated budget for this contract can be based on the quantity and unit price of the copper tubing. However, the unit price is not provided in the document. Assuming an average unit price of $10 per foot of copper tubing, the total budget can be estimated as follows: 160,000 feet of 1/2" hard copper tube at $10 per foot = $1,600,000 160,000 feet of 1" hard copper tube at $10 per foot = $1,600,000 300,000 feet of 1 1/4" hard copper tube at $10 per foot = $3,000,000 100,000 feet of 2" hard copper tube at $10 per foot = $1,000,000 100,000 feet of 2 1/2" hard copper tube at $10 per foot = $1,000,000 100,000 feet of 3" hard copper tube at $10 per foot = $1,000,000 The total estimated budget for the contract can be around $8,200,000. However, this is a rough estimate and the actual budget may vary based on the unit price and other factors.