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

### Instruction:
John is laying the foundation for 3 homes. Each home needs a slab of concrete that is 100 feet by 100 feet by .5 feet. Concrete has a density of 150 pounds per cubic foot. A pound of concrete cost $.02 per pound. How much does the foundation cost?

### Response:
 Kiasi cha ujazo wa sakafu ni futi 100 * futi 100 * futi 0.5 = 5000 ujazo wa futi.
Hivyo, ina uzito wa pauni 5000 * 150 = 750000 pauni.
Hii inamaanisha gharama ni 750000 * $0.02 = $15000 kwa kila nyumba na $45000 jumla.