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

### Instruction:
Erika and her brother Rick want to buy a gift for their mother that costs $250. They have both saved money. Erika saved $155 and her brother saved only half of the cost of the gift. They also want to surprise their mother with a birthday cake that costs $25. How much money will they have left after buying their mother a gift and cake?

### Response:
 Akiba ya Rick ni nusu ya bei ya zawadi, ambayo ni $250 / 2 = $<<250/2=125>>125.
Ili kununua zawadi kwa mama yao, watahitaji $250 + $25 kwa keki = $<<250+25=275>>275.
Erika na Rick pamoja wameokoa $155 + $125 = $<<155+125=280>>280.
Baada ya kununua mama yao zawadi na keki, watakuwa na $280 - $275 = $<<280-275=5>>5 zilizobaki.