Answer the following questions using the information below: The following information is for the Jeffries Corporation Product A: Revenue $16.00 $12.00 Variable Cost $24.00 $16.00 Product B: Revenue Variable Cost Total fixed costs $75,000 Assume the sales mix consists of three units of Product A and one unit of Product B. If the sales mix shifts to four units of Product A and one unit of Product B, then the weighted-average contribution margin will 0 A. decrease per unit B. increase per unit O C. stay the same O D. either increase or stay the same