A, B and C are partners. During the year ended 31st March, each of the partners withdrew Rs. 10,000 regularly. A withdrew in the beginning of the first 6 months of the year, B withdrew in the middle of the month for the first 6 months of the year and C withdrew at the end of the month for the first 6 months. Calculate interest on drawings @6% p.a. for the year ended 31st March