Answer:
the required sales needed to achieve management’s target net income of $60,000: $900,000
Explanation:
The required sales needed to achieve management’s target profit figure are calculated by using following formula:
The required sales = (Total fixed cost + Targeted profit) / Contribution margin ratio.
For Rivera Company, variable costs are 70% of sales. The contribution margin ratio is calculated by using following formula:
Contribution margin ratio = (Sales - Total Variable cost)/Sales  = (Sales - 70% of sales)/Sales =  30%
The contribution margin ratio = 30%
The required sales = ($210,000 + $60,000)/30% = $900,000