Answer:
The Supplies account would be debited on the left side of the T-account and the Cash account would be credited on the right side of the T-account.
Explanation:
Supplies
DEBIT CREDIT
(LEFT) (RIGHT)
300
We debit supplies as it represnet an asset , something the company owns. Thus it will increase from the debit
Cash
DEBIT CREDIT
(LEFT) (RIGHT)
300
We credit cash is it is assets which is being decreased. We use the cash to acquire the supplies. We no longer have those 300 dollars we use to purchase the supplies.