The computer and printer cost 400+40=<<400+40=440>>440 dollars.

Delores has 450-440=<<450-440=10>>10 dollars left.

# Answer

10
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Delores has $450. She buys a computer for $400 and a printer for $40. How much money, in dollars, does Delores have left?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
10
Delores has $450. She buys a computer for $400 and a printer for $40. How much money, in dollars, does Delores have left?
train