Part B with explanation please.

Pillsbury Company's record of transactions concerning the month of September were as follows: Compute the inventory at September 30 on each of the following bases. Assume that the company used the periodic method to report its inventory. Carry unit costs to the nearest cent. First-in, first-out (FIFO). Last-in, first-out (LIFO). Average cost. Repeat your calculations in (1), (2), and (3) above, under the assumption that the company used the perpetual method to report its inventory. Carry average unit costs to at least two decimal places