A company makes and sells product X and product Y. Twice as many units of product Y are ma

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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?

A.7,500

B.22,500

C.15,000

D.16,875

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗