What will be the difference between the total simple interest and the total compound interest at the end of 8 years on a certain sum at the same rate of interest? I. The total simple interest on the same sum at the end of 3 years is ₹ 750. II. The total compound interest on the same sum at the end of 2 years is ₹ 512.50. III. The rate of interest is 5 p.c.p.a.