A company produces very unusual CD's for which the variable cost is $ 17 per CD and the fixed costs are $ 45000. They will sell the CD's for $ 85 each.

Let $\displaystyle {n}$ be the number of CD's produced, $\displaystyle {C}{\left({n}\right)}$ be the cost for producing n CD's, $\displaystyle {R}{\left({n}\right)}$ equal the revenue earned from selling n CD's, and $\displaystyle {P}{\left({n}\right)}$ equal the total Profit (Revenue minus Cost). Which of the following represents the profit function for this scenario?