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? Give me reasons, before answering the question
User
The computer and printer cost 400 + 40 = 440 dollars. Delores had 440 + 10 = 450 dollars at first. So the final answer is 450.
Assistant