He had to pay for 2 hours of labor, which cost 2*$75=$<<2*75=150>>150

So the total cost was $150+$150=$<<150+150=300>>300

# Answer

300
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
300
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?
train