Mark needs to replace the radiator in his car. The work takes 2 hours and the mechanic charges $75 an hour. The part cost $150. How much did he pay? Give me reasons, before answering the question
He had to pay for 2 hours of labor, which cost 2 * $75 = $150. So the total cost was $150 + $150 = $300. So the final answer is 300.