Final answer:
To calculate Erza's sales revenue, use the contribution margin ratio formula: 30% = (Sales Revenue - Variable Cost) / Sales Revenue. By solving for Sales Revenue, we get $34,800.
Step-by-step explanation:
To calculate Erza's sales revenue, we need to use the contribution margin ratio formula. The contribution margin ratio is the difference between the selling price and variable cost per unit, divided by the selling price. We know that the contribution margin ratio is 30%, profit is $17,400, and fixed costs are $14,700. Let's denote sales revenue as 'X'.
Contribution Margin Ratio = (Sales Revenue - Variable Cost) / Sales Revenue
30% = (X - Variable Cost) / X
Solving for X, we find that Sales Revenue = $34,800. Therefore, the answer is option a. $35,121.