Answer the Following Questions Using the Information Below

Answer the following questions using the information below:
The following information is for the Jeffries Corporation:

-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 ________.

A) increase per unit
B) stay the same
C) decrease per unit
D) cannot be determined from this information