Cullumber Company uses a perpetual inventory system. The company began 2021 with 800 lamps in inventory at a cost of $12 per unit. During 2021, Cullumber had the following purchases and sales of lamps: February 15 Purchased April 24 Sold 1,600 units @ $18 per unit 2,000 units @ $30 per unit 2,800 units @ $23 per unit June 6 Purchased October 18 Sold 1,600 units @ $33 per unit 1,120 units @ $26 per unit December 4 Purchased All purchases and sales are on account. Calculate the cost of goods sold and ending inventory using weighted average. (Round the weighted average cost per unit to three decimal places, e.g. 5.275 and final answers to 0 decimal places, e.g. 5,275.) Average Cost of goods sold $ $ Ending inventory $ $ Prepare journal entries to record the June 6 purchase and the October 18 sale. (Credit account titles are automatically indented when the amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter O for the amounts. Round the average cost per unit to three decimal places, e.g. 5.275 and final answers to 0 decimal places, e.g. 5,275.) Date Account Titles and Explanation Debit Credit June 6 (To record purchase on account.) Oct. 18 (To record sales on account.) Oct. 18 (To record cost of goods sold.) Calculate gross profit for the year. (Round answer to 0 decimal places, e.g. 5,275.) Gross profit $