Concord Inc. uses a perpetual inventory system. Its records show the following for the month of May.

$($b$)$

Calculate the cost of goods sold for May and the ending inventory at May $31$ using the average cost formula.

$($Round average unit cost to $3$ decimal places, e$.$g$.15\mathrm{.}235$ and final answers to $2$ decimal places,

e$.$g$.525\mathrm{.}25.)$

Cost of goods sold:

Ending inventory: