if i could please have help with A-C

Periodic Inventory by Three Methods The units of an item available for sale during the year were as follows: Jan. 1 Inventory 8 units @ $45 Feb. 17 Purchase 13 units @ $47 July 21 Purchase 20 units @ $48 Nov. 23 Purchase 20 units @ $49 There are 8 units of the item in the physical inventory at December 31. The periodic inventory system is used a. Determine the inventory cost by the first-In, first-out method.