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

### Instruction:
Dave bought 8 books about animals, 6 books about outer space, and 3 books about trains to keep him busy over the holidays. Each book cost $6. How much did Dave spend on the books?

### Response:
 Dave ananunua vitabu 8 + vitabu 6 + vitabu 3 = <<8+6+3=17>>17 jumla ya vitabu.
Anapaswa kutumia vitabu 17 × $6/kitabu = $<<17*6=102>>102 ikiwa anataka kununua vitabu vyote.