At the beginning of year 2015, Jerry invested Rs. 24000 in simple interest at 7% per annum. A year later, at the beginning of 2016, he invested Rs. 21000 in simple interest at 10% per annum. What will be the total amount he would have at the beginning of year 2020? 1. Rs. 53400 2. Rs. 48000 3. Rs. 61800 4. Rs. 72000 Rs. 66600 5.