A company's inventory records show the following data for the month of April.

$\backslash$table$[[$Date$,$Activities,Units Acquired at Cost,Units Sold at Retail$],[$April $1,$Beginning inventory,$400$ units @ $$18=$$$7,200,],[$April $5,$Purchase,$340$ units @ $$20=$$$6,800,],[$April $9,$Sale,$300$ units @ $$22=$$$6,600,550$ units @ $$55$