please help me with this accounting problem

I have the following three products. In the past few months I have found I don't have time to make them as much as I want. Also when I make only one product I am left with some unsold. Hour I can work in a week 100 Cars Trucks Bikes 30 40 20 Product Market Demand Selling Price Variable costs 80 68 100 40 50 80 Hour required per unit 4 2 4 Number of Cars Produced Select one: a. 25 b. 5 C. 100 d. 10 e. None of the above f. 20