Isaac & Co. manufactures three products using three different machines. Selling price per unit are $22 for product 1, $22 for product 2, and $25 for product 3. The costs/ unit of producing each product on each machine are shown in the following table: Product 1 $11.86 $6.38 $5.56 Product 2 $8.41 $4.59 $3.86 The company wants to determine how many units of each product to produce to maximize profit (contribution) margin. Let mij = number of units of product i from machine 3'; i = 1, 2, 3 j = 1, 2, 3 Select the best interpretation for each of the following constraints from the given options: f) -0.64x13 + 0.36x23 + 0.3633