At the end of her first year of university, Elizabeth Brown decided that she should start a business to help finance her education, so she set up her own courier service. She invested savings of $$1,600$ in the company, which she called Oriole Ltd$.$ In addition, her parents lent the company $$4,200$ to help it get started. Since this was a business venture, Elizabeth insisted on paying interest on this loan, and her parents agreed to charge a rate of $6\%$ per year. Elizabeth then negotiated the purchase of a used car for the business for $$9,200.$ The company made a down payment of $$2,300$ on the car and financed the remainder of the purchase price at an interest rate of $9\%$ per year. Due to all of the kilometres that would be put on the car while it was used in the courier business, Elizabeth estimated that the car could be sold at the end of the summer for $$7\mathrm{.}400.$ Oriole began operations on May $1$ and continued until August $31.$ Although Elizabeth did not keep any formal accounting records, at the end of the summer she put together the following additional information related to the business: