Answer:
Debit Supplies expense $1,400
Credit Supplies account $1,400
Step-by-step explanation:
The change in supplies account balance at the start of a period and at the end of the period is as a result of 2 factors namely; use and purchases.
While use will result in a decrease in the account balance, purchases will cause an increase. Hence when a purchase is made, debit supplies account credit cash/accounts payable, when supplies are used, credit supplies and debit supplies expense.
This may be expressed mathematically as
Opening balance + purchases - use = closing balance
$500 + $1,200 - $1,400 = closing supplies account balance
closing supplies account balance = $300
Adjusting entries required,
Debit Supplies expense $1,400
Credit Supplies account $1,400