Inventory information for Part $311$ of Sheffield Corp. discloses the following information for the month of June

$\backslash$table$[[$June $1,$Balance,$302$ units @ $$15,$June $10,$Sold,$197$ units @ $$36],[11,$Purchased,$795$ units @ $$18,15,$Sold,$499$ units @ $$38],[20,$Purchased,$499$ units @$$20,27,$Sold,$296$ units @ $$41$