Periodic inventory by three methods; cost of goods sold

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

Jan. $1$ Inventory

$50$ units at $$98$

Mar. $10$ Purchase $50$ units at $$110$

Aug. $30$ Purchase $30$ units at $$118$

Dec. $12$ Purchase $70$ units at $$122$

There are $80$ units of the item in the physical inventory at December $31.$ The periodic inventory system is used.

Cost of Ending Inventory and Cost of Goods Sold

First$-$in$,$ first$-$out $($FIFO$)$

Last$-$in$,$ first$-$out $($LIFO$)$

Weighted average cost