$6.$ A company that prepares its financial statements using IFRS wrote down its inventory value by

$20,000$ at the end of year $1.$ In year $2,$ prices increased and the same inventory at the end of the year

was worth $30,000$ more than its value at the end of the prior year.

Determine if the company$$s cost of sales was increased or decreased. If so$,$ by what amount?