Mr. Martin likes to buy vegetables and fruit from roadside stands. Yesterday he bought 4.5 pounds of apples at $1.28 per pound, 2.5 pounds of grapes at $1.59 per pound, and 6.4 pounds of red potatoes at $0.87 per pound. He paid for his purchases with a $50-bill. How much change did he get?

Guest Apr 16, 2021