human
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?
assistant
How much will knives 2, 3 & 4 cost to sharpen? ** Knives 2, 3 & 4 will cost $4.00 each to sharpen so that’s 3*4 = $12.00
How much will knives 5-9 cost to sharpen? ** Knives 5-9 will cost $3.00 each to sharpen so that’s 5*3 = $<<5*3=15.00>>15.00
How much will it cost to sharken Otto’s knives? ** 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 = $<<5+12+15=32.00>>32.00
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