Choudry Company: APP Linear Programming - Level Production, Overtime, and Subcontracting Regular Prod. Capacity =15,000 units/qutr Regular Prod. Cost =$8/ unit Overtime Prod. Capacity =3,500 units/qtr Overtime Prod. Cost =$13/ unit Subcontracting Capacity =13,000 units/qtr Subcontracting Cost =$18/ unit Inventory Capacity =18,000 units/qtr Inventory Cost =$7/ unit/qut Beginning Inventory =4,900 units Linear Programming is to be used to determine the optimal mixture of Level Production, Overtime, and Subcontracting strategies, How many decision variables are in the model? 7 18 15 19 12