There are 400 hours available on the machine during the week. How many units should be produced and sold to maximize the weekly contribution margin? * NUBD Co. produces three products, A1, B2 and C3. A machine is use to produce the products. The contribution margin, sales demand, and time of the machien (in minutes) are as follows: Product A Product B Product C Demand 1,000 800 1,500 Contribution margin P20 P18 P25 Machine time 10 5 10