6. Afzal Furnishings Ltd manufactures and sells dining tables and garden tables. Abir and Adeel are directors of the company, which has been trading for the past three years. The company's Profit and Loss Accounts (Income Statement), since the company was incorporated, are shown below: 2018 2019 2020 $ $ $ Sales 37,500 41,300 42,350 Revenue Cost of Sales 13,725 15,750 Contribution 23,775 26,075 ? Wages 5,200 5,500 6,750 Rent 4,000 4,250 4,500 Rates 2,500 2,500 2,500 Other 4,250 4,500 4,550 Expenses Total Expenses Net Profit 15,950 16,750 ? ? 9,325 8,300 Using the information in the table above, calculate the following: - Cost of Sales (2019) Gross Profit (2020) Total Expenses (2020) Net Profit (2018)