$[$The following information applies to the questions displayed below$]$

A company began January with $7,000$ units of its principal product. The cost of each unit is $$6$ Inventory transactions for the month of January are as follows:

$\backslash$table$[[$Date of Purchase,Purchases$],[$Units$,$Unit Cost,Total cost$],[$January $18,6,000,7,$$$42,000$