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 perlodic inventory system. Assume its accounting records provided the following Information at the end of the annual accounting perlod, December $31.$

$\backslash$table$[[$Transactions$,$Units,Unit cost$],[$Beginning inventory, January $1,1,400,$$$7\mathrm{.}00$