Problems 1. Della Simpson, Inc., sells two popular brands of cookies: Della's Delight and Bonny's Bourbon. Della's Delight goes through the Mixing and Baking departments, and Bonny's Bourbon, a filled cookie, goes through the Mixing, Filing, and Baking departments. Michael Shirra, vice president for sales, believes that at the current price, Della Simpson can sell all of its daily production of Della's Delight and Bonny's Bourbon. Both cookies are made in batches of 3,000. In each department, the time required per batch and the total time available each day are as follows: Department Minutes Mixing Filling Baking Della's Delight 30 0 10 Bonny's Bourbon 15 15 15 Total available per day 660 270 300 Revenue and cost data for cach type of cookie are: Della's Delight Bonny's Bourbon Revenue per batch 5475 5375 Variable cost per batch 175 125 Contribution margin per batch 5300 5250 Monthly fixed costs (allocated to cach product) | $18,650 $22,350 Required: a) Using D to represent the batches of Della's Delight and B to present the bathes of Bonny's Bourbon made and sold each day, formulate the objective function to maximise the contribution margin. b) Formulate the constraints. c) Graph the constraints and determine how many batches of each type of cookie that Della Simpson, Inc., should make and sell each day to maximize the total contribution margin