Andy bought 8 feet of copper pipe at $10.50 per foot. He also bought 5.5 feet of aluminum pipe at $8.25 per foot. Explain how to calculate the total cost of Andy's purchase. A.Step 1 Multiply $10.50 by 8 to calculate the cost of the copper pipe. Step 2 Multiply $8.25 by 5.5 to calculate the cost of the aluminum pipe. Step 3 Add the two amounts together. B.Step 1 Multiply $10.50 by 8 to calculate the cost of the copper pipe. Step 2 Multiply $8.25 by 5.5 to calculate the cost of the aluminum pipe. Step 3 Subtract the two amounts. C.Step 1 Divide $10.50 by 8 to calculate the cost of the copper pipe. Step 2 Divide $8.25 by 5.5 to calculate the cost of the aluminum pipe. Step 3 Add the two amounts together. D.Step 1 Divide $10.50 by 8 to calculate the cost of the copper pipe. Step 2 Divide $8.25 by 5.5 to calculate the cost of the aluminum pipe. Step 3 Subtract the two amounts.