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A company began January with $4,000$ units of its principal product. The cost of each unit is $$7.$ Inventory transactions for the month of January are as follows:

Includes purchase price and cost of freight.

$\backslash$table$[[$Sales$],[$Date of Sale,Units$],[$January $5,2,000],[$January $12,1,000],[$January $20,3,000],[$Total$,],[,]]$

$5,000$ units were on hand at the end of the month.

Required:

Calculate January's ending inventory and cost of goods sold for the month using FIFO, periodic system.