PQ6 Chapter 6, PR4A Part I eBook Calculator 1. PR.06.04A Periodic inventory by three methods The beginning inventory for Midnight Supplies and data on purchases and sales for a three-month period are shown below: Number of Units Date Transaction Per Unit Total 7,500 S75.00 $562,500 Jan. 1 Inventory 10 Purchase 22,500 85.00 1,912,500 28 Sale 11,250 150.00 1,687,500 30 Sale 3,750 150.00 562,500 Feb. 5 Sale 1,500 150.00 225,000 10 Purchase 54,000 87.50 16 Sale 27,000 160.00