Materials Costing Methods. The following information is to be used in

costing inventory on October $31$ :

October $1.$ Beginning balance: $800$ units @ $$6$ cach.

Purchased $200$ units $($a$)$ $$7$ each.

Purchased $200$ units @ $$8$ each.

Issued $400$ units.

Purchased $300$ units $($a$)$ $$9$ each.

Issued $500$ units.

Required: The cost of materials used and the cost assigned to the October $31$

inventory by each of these perpetual inventory costing methods: $($a$)$ first$-$in$,$

first$-$out $($fifo$)$; $($b$)$ last$-$in$,$ first$-$out $($lifo$)$; $($c$)$ moving average, using a materials

ledger card; $($d$)$ most recent purchase price.