The sum of the earnings of 'D' and 'E' is Rs. 2,20,000. 'D' uses 75% of his income, while 'E' uses 65% of hers, so that 'E's savings are Rs. 17,000 more than 'D's. If 'F's income is 10% less than the combined average savings of 'D' and 'E', find 'F's savings, assuming 'F' saves 50% of his income.