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 $,70$ units at $$110$

Aug. $30$ Purchase $30$ units at $$114$

Dec. $12$ Purchase $50$ units at $$116$

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

other calculations and your final answers to the nearest dollar.

Cost of Ending Inventory and Cost of Goods Sold