He has 2*7=<<2*7=14>>14 hats

So they cost 14*50=$<<14*50=700>>700

# Answer

700
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
John decides to replace all his hats.  He has enough hats to wear a different one every day for 2 weeks.  If each hat costs $50 how much do his hats cost?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
700
John decides to replace all his hats.  He has enough hats to wear a different one every day for 2 weeks.  If each hat costs $50 how much do his hats cost?
train