Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Jack and Jill are friends who borrow from each other often. Last week Jack borrowed  $1200 from Jill, which he promised to pay back with an interest of 10%. How much will Jack pay back?

### Response:
 Kwa kuwa riba ni 10%, Jack atalipa riba ya 1200*10% = $<<1200*10*.01=120>>120.
Jumla ya kiasi ambacho Jack anapaswa kulipa ni $1200+$120 = $<<1200+120=1320>>1320