A factory in Hackensack manufactures T-shirts. The factory has monthly operating costs of $14,000 per month regardless of how many shirts are produced. Additionally, the factory must spend $7.45 for each shirt produced. In July, the total factory costs were $19,000. Approximately how many shirts were produced? Find an expression for C(n) where cost is a function of the number of shirts produced (n). The factory charges $22.90 per shirt. Find a function for revenue in terms of n (number of shirts produced).

Find the number of shirts at which the company makes zero profit.