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Ivanhoe Company Inc. had a beginning inventory of $110$ units of Product RST at a cost of $$7$ per unit. During the year, purchases were:

Ivanhoe Company uses a periodic inventory system. Sales totaled $1,560$ units.

$($a$)$

Determine the cost of goods available for sale.

The cost of goods available for sale

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

Weighted$-$average cost per unit

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$($b$)$

The parts of this question must be completed in order. This part will be available when you complete the part above.

$($c$)$

The parts of this question must be completed in order. This part will be available when you complete the part above.