Gladstone Limited tracks the number of units purchased and sold throughout each accounting period but applies its inventory costing method at the end of each period, as if it uses a periodic inventory system. Assume its accounting records provided the following information at the end of the annual accounting period, December $31.$

$\backslash$table$[[\backslash$table$[[$Transactions$],[$Beginning inventory, January $1],[$Transactions d$$ring the year:$]],\backslash$table$[[$Units$],[1,400]],\backslash$table$[[$Unit Cost$],[$$$6\mathrm{.}00$