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

Delores had 440+10=<<440+10=450>>450 dollars at first.

# Answer

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

user
450
Delores has some money. She buys a computer for $400 and a printer for $40. If she has $10 left, how much money, in dollars, did Delores have at first?
train