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# The cost of manufacturing toothbrushes is 0.4 cents per brush. The cost of manufacturing dental floss is 0.5 cents per roll.

The cost of manufacturing toothbrushes is 0.4 cents per brush. The cost of manufacturing dental floss is 0.5 cents per roll. Assume that if toothbrushes are sold at x cents each and dental floss is sold at y 50000 70000 cents per roll, then the demand function is for toothbrushes and for xy xy dental floss. What are the selling prices that correspond to maximum profit?