Multiply 200 pounds by the buyer's quote for your specific aluminum grade. At an example $0.50 per pound, that is $100 before deductions. At $0.75 per pound, the same weight is $150. Use the quote for cans, cast aluminum, wheels, or extrusions rather than assuming all aluminum earns one rate.
For cans, weigh the accepted load instead of multiplying by a fixed value per can: can weights vary. A bottle-deposit refund, where available, follows a deposit program's rules and is different from scrap value by weight. Confirm that the buyer accepts your material and ask how moisture, steel attachments, or contamination affect payment.