Weighted Average Cost Flow Method Under Perpetual Inventory System

The following units of a particular item were available for sale during the calendar year:

$\backslash$table$[[$Jan$.1,$Inventory,$10,000$ units at $$75\mathrm{.}00],[$Mar$.18,$Sale,$8,000$ units$],[$May $2,$Purchase,$18,000$ units at $$77\mathrm{.}50],[$Aug$.9,$Sale,$15,000$ units$],[$Oct$.20,$Purchase,$7,000$ units at $$80\mathrm{.}25]]$

two decimal places, if necessary.