Answer:
$9000
Explanation:
he $10,000 expected sales represent the cost of goods sold COGS.
Calculating COGS is by the equal the formula
COGS = opening stock + purchase - closing stock
in this case
$10,000 = $2000 + Purchases - $1000
$10,000 = $2000-$1000 + purchases
Purchases = $10,000 -$1000
Purchases =$9,000