1. Amount Payable on First and Final Call:
Balance amount = ₹ 12 (total) - ₹ 7 (application and allotment) = ₹ 5.
2. Shares Forfeited:
Number of shares forfeited = 1,000.
3. Unpaid Amount Calculation:
Total unpaid amount = \( 1,000 \times ₹ 5 = ₹ 5,000. \)
4. Treatment in Calls in Arrears Account:
When shares are forfeited, the unpaid amount is credited to the Calls in Arrears Account:
\[
\text{Calls in Arrears Account Credited} = ₹ 5,000.
\]