A construction company was paid a total of $500,000 for a construction project. The company’s only costs for the project were for labor and materials. Was the company’s profit for the project greater than $150,000?
(1) The company’s total cost was three times its cost for materials.
(2) The company’s profit was greater than its cost for labor.
P > 150000 ? 已知：S=500000 隐含条件： S=P+C
由(1)知 C = 3Cm ，无法判断
由(2)知 P > Cl ，无法判断
(1)+(2)知：
C=Cm+Cl => Cl=2Cm , P>2/3 C => P>200000
（C）
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