Reconsider the Wyndor Glass Co. case study introduced in Section 2.1/ in class. Suppose that the estimates of the unit profits for the two new products now have been revised to $500 for the doors and $350 for the windows. A curve-fitting procedure was used to estimate the weekly marketing costs required to sustain a production rate ofDdoors andWwindows:

• Marketing cost for doors = $25D²
• Marketing costs for windows = $66W²

Hours Used Per Unit Produced :
	Doors	Windows	Available hours for each plant
Plant 1	1	0	4
Plant 2	0	2	12
Plant 3	3	2	18

Questions:

a. Formulate the model algebraically. (Please clearly define all the decision variables, clearly write down the objective function and each constraints) b. Formulate and solve the model for this problem on a spreadsheet and use the solver to solve it.

*The number of the products is required to be integer.