A work of Rs. 1260 is undertaken by 2 friends, Gopal and Rahim. Gopal can complete the work in 18 days and Rahim can complete the work in 24 days. After 4 days, Rahim left the work and Karim joined with Gopal. Karim and Gopal completed the remaining work in 5 days. Find the amount received by Karim.