If the shirt is $60\%$ off, it is currently $.4$ of the original price.  Thus the original price was

$$\frac{\$14.40}{.4}=\boxed{\$36}$$
<|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

user
\$36
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?
test