The simple interest on a certain sum for \(12 \frac{1}{2}\) years at 15% p.a. exceeds the amount of the same sum at simple interest for \(6 \frac{1}{2}\) years at 12% p.a. by Rs. 1197 . The sum (in Rs.) is:
1
13,000
2
12,800
3
12,600
4
More than one of the above
5
None of the above