It cost 250*.3=$<<250*.3=75>>75 more than his old barbell

So it cost 250+75=$<<250+75=325>>325

# Answer

325
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
James decides to buy himself a new barbell.  It cost 30% more than his old $250 barbell.  How much did it cost?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
325
James decides to buy himself a new barbell.  It cost 30% more than his old $250 barbell.  How much did it cost?
train