单选题

A company makes and sells product X and product Y. Twice as many units of product Y are made and sold as that of product X. Each unit of product X makes a contribution of $10 and each unit of product Y makes a contribution of $4. Fixed costs are $90,000.
What is the total number of units which must be made and sold to make a profit of $45,000?

【正确答案】 B
【答案解析】

Two units of Y and one unit of X would give total contribution of $18.
Weighted average contribution per unit = $18/3 units = $6
Sales units to achieve target profit = ($90,000 + $45,000)/$6 = 22,500