My question is: John buys 30 ducks for $10 each. They weigh 4 pounds and he sells them for $5 per pound. How much profit did he make? Your thoughts:
He bought the ducks for 30 * 10 = $300. He sold each duck for 4 * 5 = $20. So he sold all the ducks for 30 * 20 = $600. So he made a profit of 600 - 300 = $300. The final answer: 300.