Aviation Electronics produces three types of switching devices. Each type involves a two-step assembly operation. The assembly times are shown in the following table: Assembly Time per Unit (minutes) Station 1 Station 2 Model A 2.5 3.0 Model B 1.8 1.6 Model C 2.0 2.2 Page 1 of 2 Each workstation has a daily working time of 7.5 hours. Manager Bob Parkes wants to obtain the greatest possible profit during the next live working days. Model A yields a profit of $8.25 per unit, Model B a profit of S7.50 per unit and Model Ca profit of $7.80 per unit. Assume that the firm can sell all it produces during this time. but it must fill outstanding orders for 20 units of each model type Formulate the