Answer:
The expense account will be increased by $22,200
Step-by-step explanation:
During the first year, all purchases were recorded as assets instead of expenses(supplies). This means asset account have been overstated while expenses account have been understated.
The adjusting entry will be
Supplies purchased - Actual year-end supplies
$28,800 - $6,600
$22,200.
The expense account will be increased by $22,200