When identical units of an item are purchased at different costs, a. an inventory cost flow method must be used under a perpetual inventory system only. b. an inventory cost flow method must be used under both a perpetual and a periodic inventory system. c. an inventory cost flow method is not used under either a perpetual or a periodic inventory system. d. an inventory cost flow method must be used under a periodic inventory system only?

Faldo corp sells on terms that allow customers 45 days to pay for merchandise. its sales last year were $325,000, and its year-end receivables were $60,000. if its dso is less than the 45-day credit period, then customers are paying on time. otherwise, they are paying late. by how much are customers paying early or late? base your answer on this equation: dso - credit period = days early or late, and use a 365-day year when calculating the dso. a positive answer indicates late payments, while a negative answer indicates early payments.a. 21.27b. 22.38c. 23.50d. 24.68e. 25.91b