Sally quit her job as an auto mechanic earning $60,000 per year to start her own business. To save money she operates her business out of a small building she owns which, until she started her own business, she had rented out for $15,000 per year. She also invested her $20,000 savings (which earned a market interest rate of 6% per year) in her business. You are given the following information about the first year of her operations. [Show your work] Total revenue $120,000 Cost of labor 40,000 Cost of materials 15,000 Equipment rental 5,000 1. Sally's economic cost of running her business. (2 marks) A