A man invested Rs. 5P in scheme X earning simple interest at (R – 4) % per annum. After 4 years money amounts to Rs. 7.4P. He gives 60% what he invested to his friend, his friends invested this money in scheme Y for 3 years earning compound interest at (R/2 + 7)% per annum. The difference between simple interest and compound interest earned is Rs. 2679.60. Find the money invested in scheme X.