OG: The profit P, in dollars, for any given month at a certain company is defined by

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The profit P, in dollars, for any given month at a certain company is defined by P = I – C, where I represents total income, in dollars, and C represents total costs, in dollars, for the month. For each of the first 4 months of the year, C = I + 32,000; and for each of the next 3 months, I = C + 36,000. If I = C + 10,000 for each of the 5 months of the year, what was the company’s total profit for the 12-month year?

A. $10,000
B. $30,000
C. $40,000
D. $50,000
E. $70,000

B