Perpetual Inventory Using LIFO

Beginning inventory, purchases, and sales for Item PK$95$ are as follows:

March $1$ Inventory $104$ units @ $$32$

$5$ Sale $83$ units

$11$ Purchase $115$ units @ $$36$

$21$ Sale $97$ units

Assuming a perpetual inventory system and using the last$-$in$,$ first$-$out $($LIFO$)$ method, determine $($a$)$ the cost of merchandise sold on March $21$ and $($b$)$ the inventory on March $31.$

a$.$ Cost of merchandise sold on March $21$ $fill in the blank $1$

b$.$ Inventory on March $31$ $fill in the blank $2$