4. Compute the cost of sales for January 2021, assuming for this part only that Kramer uses the weighted-average cost method. (Do not round intermediate calculations. Round the final answer to the nearest dollar amount.) Total cost of sales No Date General Journal Debit Credit 1 Jan 06 1,500 Inventory Accounts payable 1,500 2 Jan. 08 1,360 Accounts receivable Sales 1,360 3 3 Jan. 08 790 Cost of sales Inventory 790 340 4 Jan. 15 Sales returns and allowances Accounts receivable 340 Kramer Corp. reported the following sale and purchase transactions related to a specific product in January 2021 Date Jan. 1 Jan. 3 Jan. 6 Jan. 8 Jan. 9 Jan. 15 Transaction Quantity Unit cost Unit Sales Price Beginning inventory 9 units $ 95 Sale on account 7 units $170 Purchase on account 15 units 100 Sale on account 8 units 178 Sale on account 5 units 170 Sales returned due to damage, $340 (two units that were sold on January 9). The units were in very poor condition and were destroyed