I'll give you a question, please answer with step-by-step reasoning process.
James can buy a new computer for $600 and have it last 6 years, or buy 2 used computers for $200 each that each last 3 years. How much money will he save by picking the cheaper option?

200
First find the cost of the two used computers: $200 / computer * 2 computers = $400.

Then subtract that cost from the cost of the new computer to find the savings: $600 - $400 = $200.

.

The answer is 200