The estimated cost of lost inventory = $4552.1
Explanation:
The cost of lost inventory = inventory,begining+purchases of the period-((1-avg gross profit ratio)(sales for the period-returns for the period))
The cost of lost inventory=$29900+$18900-((1-0.21)($56900-$890))
=$48800-((0.79)(56010))
=$48800-(44247.9)
=$4552.1
The estimated cost of lost inventory is $4552.1