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

### Instruction:
Krystiana owns an apartment building. The rooms on the first floor cost $15 per month and the rooms on the 2nd floor cost $20 per month. The rooms on the third floor cost twice as much as the rooms on the first floor, but only two rooms are occupied. If each floor has 3 rooms, how much does Krystiana earn every month?

### Response:
 Krystiana anapata $15 x 3 = $<<15*3=45>>45 kwa vyumba vya sakafu ya kwanza kila mwezi.
Anapata $20 x 3 = $<<20*3=60>>60 kwa vyumba vya sakafu ya pili kila mwezi.
Na gharama ya kila chumba cha sakafu ya tatu ni $15 x 2 = $<<15*2=30>>30.
Hivyo, jumla ya kiasi anachopata kwa vyumba vya sakafu ya tatu ni $30 x 2 = $60 kila mwezi.
Hivyo, jumla ya kiasi anachopata kutoka kwenye jengo la vyumba vya kupanga ni $60 + $60 + $45 = $<<60+60+45=165>>165.