David can buy a copier from Staples for $500 that prints, copies, and scans. He can either

Question:

David can buy a copier from Staples for $500 that prints, copies, and scans. He can either pay the total amount at the time of purchase, or he can agree to pay the store $50 down and $40 a month for 12 months. How much money can he save by paying the total amount at the time of purchase?

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