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

### Instruction:
Silvia wants to buy a new guitar online. The price of the guitar has a suggested retail price of $1000. Guitar Center has a special deal of 15% off but has a shipping fee of $100. Sweetwater has a 10% off deal with free shipping. How much will she save by buying from the cheaper store compared to the other store?

### Response:
 15% punguzo ya $1000 ni (15/100)*$1000 = $150
Punguzo linasaidia kuokoa $150 lakini gharama ya usafirishaji ni $100 hivyo jumla ya gharama ni $150-$100 = $50
10% punguzo ya $1000 ni (10/100)*$1000 = $100
Na usafirishaji bure, jumla ya gharama ni $100-$50 = $50 nafuu kuliko kununua kutoka Guitar Center