A sum of Rs. 50,250 is divided into two parts such that he simple interest on the first part for $$7frac{1}{2}$$ years at $$8frac{1}{3}% $$ p.a. $$frac{5}{2}$$ is times the simple interest on the second part for $$5frac{1}{4}$$ years at 8% p.a. What is the difference (in Rs.) between the two parts?