human
Mark's car breaks down and he needs to get a new radiator. The cost for a new radiator is $400 but he goes to get it at a junk shop and gets it for 80% off. He then hires a mechanic to install it and it takes 3 hours at $50 an hour. How much did he pay?
assistant
How much did Mark get off the radiator? ** The discount on the radiator was 400*.8=$<<400*.8=320>>320
How much did Mark pay? ** So he paid 400-320=$<<400-320=80>>80
How much did the mechanic charge? ** The mechanic charges 3*50=$<<3*50=150>>150
How much did Mark pay? ** So in total he paid 80+150=$<<80+150=230>>230
#### 230