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

### Instruction:
Mark has the option of getting a $300 lens with a 20% discount or a $220 lens.  How much money does he save by buying the cheaper lens?

### Response:
 Punguzo ni sawa na 300*.2=$<<300*.2=60>>60
Hivyo atalipa 300-60=$<<300-60=240>>240 kwa lensi ghali zaidi
Hii inamaanisha anaokoa 240-220=$<<240-220=20>>20 kwa kununua lensi ya bei rahisi