18) Under the periodic inventory system, which of the following amounts will always stay the same regardless of the inventory valuation method used? A) ending merchandise inventory B) cost of goods sold C) gross profit D) net purchases 36) The accounts receivable turnover ratio measures Na company's ability to pay its current liabilities with its current assets BDhow many days it takes, on average, to collect receivables C) how many days it takes, on average, to sell the inventory Di the number of times a company collects the average accounts receivable balance in a year