Current Attempt in Progress The following information relates to Ayayai Back Falls Ltd.'s inventory transactions during the month of February. All of the units sold were priced at $87.00 per unit. (a1) Your answer is incorrect. Ayayai Back Falls Ltd. uses the periodic inventory system. Calculate Ayayai Back's cost of goods sold, gross margin, and ending inventory for the month of February using weighted-average. (Round calculations for cost per unit to 2 decimal places, eg. 10.52 and final answers to 0 decimal places, eg. 61,052) Cost of goods sold Gross margin Ending inventory $