Answer and Explanation:
The appropriate month-end adjusting entry is shown below:
Supplies expense Dr $3,400
To Supplies $3,400
(being supplies expense is recorded)
Working note:
= Supplies on hand at the beginning + purchase - end of the month
= $2,400 + $3,500 - $2,500
= $3,400
Here the supplies expense is debited as it increased the supplies and credited the supllies as it decreased the assets