Question: Otto’s local kitchen supply store charges $5.00 for the first knife that you need sharpened. They charge $4.00 for the next 3 knives and $3.00 for any knife after that. If Otto has 9 knives that need to be sharpened, how much will it cost to sharpen his knives? Think carefully first, then make a decision:
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Knives 2, 3 & 4 will cost $4.00 each to sharpen so that’s 3 * 4 = $12.00. Knives 5 - 9 will cost $3.00 each to sharpen so that’s 5 * 3 = $15.00. The first knife will cost $5.00, the next 3 cost $12.00 and the rest cost $15.00 for a total of 5 + 12 + 15 = $32.00. So the answer is 32.
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