4. El Cheepee makes three models of its office chairs. Use the following data to determine the most profitable sales mix if given the following demands for the chairs. Complete the chart below Product Contribution Margin Standard Luxury Elegant Selling Price per Unit $125 $300 $450 Variable Cost per Unit 80 175 215 Contribution Margin per Unit Labor Hours per Unit 1.5 5 hours 7 hours hours Contribution Margin per Labor Hour Assume El Cheepee can only produce 10.000 chairs total per year in the following individual quantities: Standard: Total demand 7.550 chairs Luxury: Total Demand 3,000 chairs Elegant: Total Demand 2,500 chairs How many of each models should El cheepee produce? Standard: Luxury: Elegant