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

### Instruction:
 John ana milango 3 ya vyumba na milango miwili ya nje ya kubadilisha. Milango ya nje inagharimu $20 kila moja kubadilisha na milango ya vyumba inagharimu nusu ya gharama hiyo. Analipia kiasi gani jumla?


### Response:
 Milango ya nje inagharimu $20 kila moja kubadilisha na ana milango miwili hivyo ni 20*2 = $<<20*2=40>>40
Milango ya vyumba inagharimu nusu ya gharama ya milango ya nje hivyo inagharimu $20/2 = $<<20/2=10>>10 kila moja
Ana milango 3 ya vyumba ya kubadilisha hivyo ni 3*$10 = $<<3*10=30>>30
Jumla anapaswa kulipa $40+$30 = $<<40+30=70>>70 kubadilisha milango yote