Required: With a perpetual inventory control system in use, state the cost

of materials consumed and the cost assigned to the inventory at the end of May

using: $($a$)$ first$-$in$,$ first$-$out costing; $($b$)$ last$-$in$,$ first$-$out costing; and $($c$)$ average

costing. Present computations using materials ledger cards.