If Rs. (M+1000) is invested at 20% compound interest per annum for 2 years compounded annually and the interest received is Rs. 3080. Rs. M is invested at 8% per annum simple interest for 4 years and Rs. (M-2000) is invested at 10% simple interest per annum for 4 years. Find the ratio of the interest received from the sums which are Rs. M and Rs. (M-2000) respectively.