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

### Instruction:
 Katika saluni ya kuchana ya Mario, kuchana kunagharimu 50% zaidi wakati wa wikendi. Ikiwa Mario alilipa $18 kwa kuchana yake ya mwisho Jumatatu, angekulipa kiasi gani siku iliyotangulia?


### Response:
 Kwa kuwa kuchana cha Mario Jumatatu kingekuwa ghali zaidi kwa 50% Jumapili au $18 * .50 = $9 zaidi
Hii inamaanisha kuchana cha Jumapili kingekuwa $18 + $9 = $27