REl sells snowboards. Assume the following information relates to REl's purchases of snowboards during September. During the same month, $104$ snowboards were sold. REI uses a periodic inventory system.

$\backslash$table$[[$Date$,$Explanation,Units,Unit Cost,Total Cost$],[$Sept$.1,\backslash$table$[[$Inventory$]],14,$$$110,$$$1,540$