help figuring this out

E6-14 Jhventory by three methods e unnts of an item available for sale during the year were as follows: 27 units at $400 54 units at $460 63 units at $520 56 units at $550 Jan. 1 Feb. 19 June 8 Oct. 7 Inventory Purchase Purchase Purchase There are 45 units of the item in the physical inventory at December 31. Determine the cost of ending inventory using (a) the first-in, first-out method, (b) the last-in, first-out method, and (c) the weighted average cost method