The following formula is used in economics to find a company's net income N where P is the sales price, V is the variable cost per unit, S is the sales volume, and Fare fixed costs.
N = S. (P-V) - F
Rearrange the formula to highlight the sales volume.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.