Pharoah Inc. uses a periodic inventory system. Its records show the following for the month of May, in which $68$ units were sold.

$\backslash$table$[[$Date$,$Explanation,Units,Unit Cost,Total Cost$],[$May $1,$Inventory,$35,$$$9,$$$315$

Calculate the ending innventory on may $31$ using the FIFO, LIFO, and average cost methods