The following data regarding purchases and sales of a commodity were taken from the related perpetual inventory account:

Calculate the cost of the ending inventory at July $31,$ using $($a$)$ the first$-$in$,$ first$-$out $($FIFO$)$ method and $($b$)$ the last$-$in$,$ first$-$out $($LIFO$)$ method. Identify the quantity, unit price, and total cost of each lot in the inventory.