In its first month of operations, Oriole Company made three purchases of merchandise in the following sequence: $(1)650$ units at $$4,(2)750$ units at $$6,$ and $(3)850$ units at $$7.$ Oriole uses a periodic inventory system.

$($a$1)$

$$ Your answer is correct.

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

Weighted$-$average unit cost

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Attempts: $2$ of $3$ used

$($a$2)$

Compute the cost of the ending inventory under the average$-$cost method, assuming there are $550$ units on hand at the end of the period. $($Round answer to $0$ decimal places, e$.$g$.125.)$

Cost of the ending inventory $