21 A company produces four products A, B, C and D. The following information is available for these products. Required: 1.Find Optimal Production Plan 2.Calculate total contribution at the optimal production plan you have calculated. 3.Find out the total profit at the optimal point you have calculated if Fixed Cost is $20000. (Non-anonymous question) (10 Points) A B C D Selling price per unit $40 $50 $20 $30 Variable cost per unit 30 40 16 28 Materials per unit 5 kg 4 kg 5 kg 2 kg Labour hours per unit 4 hrs. Machine hours per unit 2 4 hrs. 3 6 hrs. 2 hrs. 4 0.5 Maximum demand 2000 units 4000 units 4000 units 5000 units Availability of the resources is limited as follows. Materials 60000 kg Labour 70000 hours Machine hours 36000