Weighted average cost method with perpetual inventory

The beginning inventory at Midnight Supplies and data on purchases and sales for a three$-$month period ending March $31$ are as follows:

$\backslash$table$[[$Date Transaction,$\backslash$table$[[$Number$],[$of Units$]],$Per Unit,Total$],[$Jan$.1$ Inventory,$9,000,$$$60\mathrm{.}00,$$$540,000$