Answer:

Purchase of merchandise on account:

Date: September 15

Accounts Payable - Clang Supplies Dr. P100,000

Purchase Returns and Allowances Cr. P10,000

Accounts Payable - Clang Supplies Cr. P90,000

Explanation: The initial purchase of merchandise is recorded by debiting the Accounts Payable - Clang Supplies account for the total amount and crediting the Purchase Returns and Allowances account for the value of the returned damaged goods. The remaining balance is credited to the Accounts Payable - Clang Supplies account.

Return of damaged goods:

Date: September 15

Purchase Returns and Allowances Dr. P10,000

Accounts Payable - Clang Supplies Cr. P10,000

Explanation: The return of the damaged goods is recorded by debiting the Purchase Returns and Allowances account and crediting the Accounts Payable - Clang Supplies account for the amount returned.

Payment of the remaining balance:

Date: September 25

Accounts Payable - Clang Supplies Dr. P90,000

Cash Cr. P90,000

Explanation: The full payment of the remaining balance is recorded by debiting the Accounts Payable - Clang Supplies account and crediting the Cash account for the total amount paid.

These journal entries account for the purchase, return, and payment transactions under the periodic inventory system.

Answer:

Here are the necessary journal entries under the periodic inventory system:

1. Purchase of merchandise:

Merchandise Inventory (Dr) - P100,000

Accounts Payable (Cr) - P100,000

2. Return of damage goods:

Accounts Payable (Dr) - P10,000

Merchandise Inventory (Cr) - P10,000

3. Payment of account within discount period:

Accounts Payable (Dr) - P98,000

Merchandise Inventory (Cr) - P2,000

Cash (Cr) - P96,000

Note: The Merchandise Inventory account is debited or credited depending on the cost of the merchandise returned or sold.