Can someone explain to me how to do this please?

Valley Company's adjusted trial balance on August 31, its fiscal year-end, follows. It categorizes the following accounts as selling expenses: sales salaries expense, rent expense-selling space, store supplies expense, and advertising expense. It categorizes the remaining expenses as general and administrative. Merchandise inventory (ending) Other (noninventory) assets Total liabilities Common stock Retained earnings Dividends Sales Sales discounts Sales returns and allowances Cost of goods sold Sales salaries expense Rent expense-Selling space Store supplies expense Advertising expense Office salaries expense Rent expense-Office space Office supplies expense Totals Debit Credit $ 37,500 150,000 $ 43,313 50,479 73,612 8,000 256,500 3,924 16,929 99,306 35,141 12,056 3,078 21,803 32,063 3,078 1,026 $423,904 $423,904 Beginning merchandise inventory was $30,263. Supplementary records of merchandising activities for the year ended August 31 reveal the following itemized costs. Invoice cost of merchandise purchases Purchases discounts received Purchases returns and allowances Costs of transportation-in $110,250 2,315 5,292 3,900 Required: 1. Compute the company's net sales for the year. 2. Compute the company's total cost of merchandise purchased for the year. 3. Prepare a multiple-step income statement that includes separate categories for net sales, cost of goods sold, selling expenses, and general and administrative expenses. 4. Prepare a single-step income statement that includes these expense categories: cost of goods sold, selling expenses, and general and administrative expenses