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

### Instruction:
 Jay alinunua kitabu kwa $25, kalamu kwa $4, na rula kwa $1. Alilipa kwa noti ya dola hamsini. Jay alipata mabadiliko kiasi gani, kwa dola?


### Response:
 Jay alitumia jumla ya dola 25+4+1=<<25+4+1=30>>30.
Alipokea mabadiliko ya dola 50-30=<<50-30=20>>20.