Ramu and Viru are insurance agents. The insurance company hired them on a condition that they get Rs. 15,000 as a monthly salary and 12% commission on sale of each insurance policy. If Ramu and Viru gets Rs. 51,000 and Rs. 54,000 respectively in any month, then find the difference between their sales.
1
25,000
2
27,000
3
30,000
4
20,000
5
None of these