Periodic inventory by three methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 825 units at $15 Feb. 17 Purchase 1,560 units at $17 Jul. 21 Purchase 1,200 units at $19 Nov. 23 Purchase 1,415 units at $21 There are 1,275 units of the item in the physical inventory at December 31. The periodic inventory system is used. This information has been collected in the Microsoft Excel Online file. Open the spreadsheet, perform the required analysis, and input your answers in the questions below. s X Open spreadsheet