Chapter 1.2, Problem 40E

Profit Find expressions for the revenue, cost, and profit from selling x thousand items. (See Example 11.)

Item Price Fixed Costs Variable Costs

Profit A self-help guru sells her book Be Happy in 45 Easy Steps for $23.50 per copy. Her fixed costs are $145,000 and the estimate of the variable cost of printing, binding, and distributing x thousand books is given by $-4.2x^2+3220z-425$ dollars. Find expressions for the revenue, cost, and profit from selling x thousand copies of the book.