Sunland Inc. uses a periodic inventory system. Its records show the following for the month of May, in which $79$ units were sold.

$($a$1)$

Calculate the weighted$-$average unit cost. $($Round answer to $3$ decimal places, e$.$g$.5\mathrm{.}125.)$

Weighted$-$average unit cost $

eTextbook and Media

Attempts: $0$ of $2$ used

$(a2)$

Calculate the ending inventory at May $31$ using the FIFO, LIFO and average$-$cost methods. $($Round answers to $0$ decimal places, e$.$g$.$

$125.)$