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A certain company sold 800 units of its product for $8 each and 1,000 units of its product for $5 each. If the company’s cost of producing each unit of its product was $6, what was the company’s profit or loss on the 1,800 units of its product?
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总收入是800*8+1000*5=11400 所有产品的成本都是6，那成本就是6*1800=10800
收入-成本=11400-10800=600 600是盈利
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