Current Attempt in Progress

Oriole Inc. uses a periodic inventory system. Its records show the following for the month of May, in which $70$ units were sold.

Calculate the ending inventory at May $31$ using the $($a$)$ FIFO, $($b$)$ LIFO, and $($c$)$ average$-$cost methods. $($Round average unit cost to $2$

decimal places, e$.$g$.2\mathrm{.}51$ and final answers to $0$ decimal places, e$.$g$.125.)$