Respective ratio of the incomes of Devas and Kajal is 7: 6 and the respective ratio of their expenditures is 5: 4. Devas saves Rs.26000 and Kajal saves Rs.24000. Malti saves Rs.22000 and her expenditure is Rs.2000 more than the expenditure of Devas. Find the difference between the incomes of Malti and Kajal.