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

### Instruction:
 Michael ana mafungu 4 ya rangi za kuchorea na anataka kununua mafungu 2 zaidi. Kifungu kimoja cha rangi za kuchorea kina gharama ya $2.5. Mafungu yote ya rangi za kuchorea ambayo Michael atakuwa nayo baada ya kununua yatakuwa na thamani ya kiasi gani?


### Response:
 Jumla Michael ana mafungu 4 * $2.5/kifungu = $<<4*2.5=10>>10 yenye thamani ya rangi za kuchorea.
Baada ya kununua mafungu 2 zaidi, atakuwa na $10 + 2 mafungu * $2.5/kifungu = $15 yenye thamani ya rangi za kuchorea.