Problem $4(30$ points$)$

Inventory information for Part $311$ of Swifty Corp. discloses the following information for the month of June.

a$)$ Assuming that the periodic inventory method is used, compute the cost of goods sold and ending inventory under

$(1)$ LIFO and $(2)$ FIFO.

b$)$ Assuming that the perpetual inventory method is used and costs are computed at the time of each withdrawal,

what is the value of the ending inventory at LIFO?

c$)$ Assuming that the perpetual inventory method is used and costs are computed at the time of each withdrawal,

what is the gross profit if the inventory is valued at FIFO?