Current Attempt in Progress

Sandhill Co$.$ uses a periodic inventory system and reports the following for the month of June.

$($a$)$

Compute the cost of the ending inventory and the cost of goods sold under FIFO, LIFO, and average$-$cost$.($For calculation purposes,

round average cost to $3$ decimal places, e$.$g$.5\mathrm{.}275.$ Round answers to $0$ decimal places, e$.$g$.125.)$