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

### Instruction:
 Mkahawa unatoa michango siku moja ambapo wanachangia $2 kwa kila $10 zilizochangwa na wateja. Mteja wa kawaida anachangia 3 na kuna wateja 40 siku hiyo. Mkahawa unachangia kiasi gani?


### Response:
 Wateja wamechangia jumla ya $120 kwa sababu 40 x 3 = <<40*3=120>>120
Wamepata $10 mara 12 kwa sababu 120 / 10 = <<120/10=12>>12
Wamechangia $24 kwa sababu 12 x 2 = <<12*2=24>>24