Given principal amount = Rs 12600
Interest = 15 %
Time = 3 years
Assuming simple interest ,
S I = PRT/100 = 12600*15*3/100 = 126*15*3 = 5670
Total amount to be paid after 3 years = 12600 + 5670 = Rs 18270
In the question it is given that he gave Rs 7070 and a sheep .
So, cost of sheep = 18270 - 7070 = Rs11200
Hence, cost of sheep = Rs 11200