The following units are available for sale during the year January 1 beginning inventory 10 units at $18 each April 3 purchase 30 units at $20 each

The following units are available for sale during the year January 1 beginning inventory 10 units at $18 each April 3 purchase 30 units at $20 each August 31 purchase 28 units and $25 each September 29 purchase 17 units at $30 each December 31 ending inventory 21 units yes determine ending cost by a FIFO method LIFO and average cost method