Answer and Explanation:
The adjusting entry is as follows:
Supplies expense Dr $2,200
To Supplies $2,200
(being the supplies expense is recorded)
Here the supplies expense is debited as it increased the expenses and credited the supplies as it decreased the assets
The computation is
= Opening supplies + purchased - closing supplies
= $1,500 + $2,900 - $2,200
= $2,200