Periodic Inventory by Three Methods

The units of an item available for sale during the year were as follows:

Jan. $1$ Inventory $15$ units at $$44$

Feb. $17$ Purchase $13$ units at $$46$

Jul. $21$ Purchase $4$ units at $$47$

Nov. $23$ Purchase $17$ units at $$49$

There are $15$ 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.

$

b$.$ Determine the inventory cost by the last$-$in$,$ first$-$out method.

$

$