i just need to know part C, regarding total cost, where did the .18 come from? the answers in the paper are correct

4. Suppose you own a copy business that targets college students. A) Assume the following Number of college students in the market: Average number of copies per student per year Your company's estimated share of the total market 25,000 125 13% SOLVE FOR THE FOLLOWING: Total annual market demand 25,000x12.5 = 3,129,000 Estimated annual company demand 3,125,000 % 13% - 2406,250 Estimated monthly demand 406,250-12. - $33,894 Estimated weekly demand 406,250 +527812.5 B) Given the following for your copy business Annual Expenses: Paper: Rent: Insurance: Advertising: Other Supplies: .01 $ 12,000 $ 2,500 $ 1.500 01 v Salaries: Hourly labor Maintenance contract Utilities: $ 30,000 $ 04 $ 2,000 $ 2,400 Total Fixed Cost: Fixed Cost/unit: TO Vorwort Variable Costunit: 064 C. Calculate the selling price per copy if you must have a markup of 25% on the selling price. SP - TC T25 - 24 D. What is the selling price per copy if you desire a 150% markup on cost? SP = (-18) (1.50) = 27