REI sells snowboards. Assume the following information relates to REl's purchases of snowboards during September. During the sameIn its first month of operations, Wildhorse Company made three purchases of merchandise in the following sequence: $(1)350$ units at

$$3,(2)400$ units at $$5,$ and $(3)500$ units at $$7.$ Wildhorse uses a periodic inventory system.

$($a$1)$

Your answer is incorrect.

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

Weighted$-$average unit cost $

month, $102$ snowboards were sold. REI uses a periodic inventory system.