2. Sales =x Sales =500x+200x( 13.5-x)
3. Profit = sales-cost = sales volume (x-2.5) = (x-2.5) (500+200 (13.5-x)) =-200 ((x-9.25) 2-45.5625).
4. When the selling price is 9.25 yuan, the maximum profit is 9 1 12.5 yuan.
Fan Wen:? Take stock of life and beautify life.
If you want to live a good life, you must be diligent in calculation. Calculate, one-third of our life is spent i