erpetual inventory using FIFO

eginning inventory, purchases, and sales for Item Zeta$9$ are as follows:

$\backslash$table$[[$Oct$.1,$Inventory,$72$ units @ $$24],[$Oct$.7,$Sale,$58$ units$],[$Oct$.15,$Purchase,$73$ units @ $$27],[$Oct$.24,$Sale,$21$ units$]]$

Assuming a perpetual inventory system and using the first$-$in$,$ first$-$out $($FIFO$)$ method, deter

a$.$ Cost of goods sold on October $24$

b$.$ Inventory on October $31$