The cost was 15*3=$<<15*3=45>>45

So the tip was 45*.2=$<<45*.2=9>>9

So in total, he paid 45+9=$<<45+9=54>>54

# Answer

54
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mark hires a singer for 3 hours at $15 an hour.  He then tips the singer 20%.  How much did he pay?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
54
Mark hires a singer for 3 hours at $15 an hour.  He then tips the singer 20%.  How much did he pay?
train