Anthony & Company uses a perpetual inventory system. The following information is available

$\backslash$table$[[,,,$Units,$\backslash$table$[[$Purchase$],[$Price$]],\backslash$table$[[$Sales$],[$Price$]]],[$Nov$.,1,$Inventory,$52,$$$5,],[4,$Purchase,$104,$$$5\mathrm{.}50,],[7,$Purchase,$104,$$$6,],[10,$Sale,$(52),,$$$8$