solution: If the shirt is $60\%$ off, it is currently $.4$ of the original price.  Thus the original price was
  
  $$\frac{\$14.40}{.4}=\boxed{\$36}$$
prompt.content: <|im_start|>system
  You are a helpful assistant.<|im_end|>
  <|im_start|>user
  A shirt's sale price is marked $\$14.40$, which is $60\%$ off the original price. How many dollars was the original price of the shirt?
  Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
  <|im_start|>assistant
  
prompt.role: user
extra_info.answer: \$36
extra_info.question: A shirt's sale price is marked $\$14.40$, which is $60\%$ off the original price. How many dollars was the original price of the shirt?
extra_info.split: test