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

### Instruction:
Julieta went to the store to buy a backpack and three ring-binders for her school supplies. She knew the backpack was $50, and each ring-binder cost was $20. However, at the store, she found out that the price of a back had increased by $5, and the price of a ring-binder had reduced by $2. Calculate the total amount of money Julieta spent at the store.

### Response:
 Bei ya begi iliongezeka kutoka $50 hadi $55.
Bei ya kijitabu ilipungua kutoka $20 hadi $18.
Julieta alinunua vijitabu vitatu kwa bei ya $18 kila kimoja, alilipa 3*$18 = $<<3*18=54>>54.
Jumla, Julieta alilipa $55+$54 = $<<55+54=109>>109 kwa begi na vijitabu vitatu.