63. Simrat and Bir are partners in a firm sharing profits and losses in the ratio of 3: 2. On 31st March, 2025 after closing the books of account, their Capital Accounts were ₹4,80,000 and ₹6,00,000 respectively. On 1st May, 2024, Simrat introduced additional capital of ₹1,20,000 and Bir withdrew ₹60,000 from his capital.

On 1st October, 2024, Simrat withdrew ₹2,40,000 from her capital and Bir introduced ₹3,00,000. Interest on capital is allowed at 6% p.a. Subsequently, it was noticed that interest on capital @ 6% p.a. had not been allowed. Profit for the year ended 31st March, 2025 was ₹2,40,000 and the partners’ drawings were:

Simrat: ₹1,20,000 and Bir: ₹60,000.

Compute the interest on capital if the capitals are (a) fixed, and (b) fluctuating.