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

### Instruction:
Kayla and Theresa went to buy some chocolate bars and soda cans. Theresa bought twice the number of chocolate bars and soda cans Kayla bought. If Theresa bought 12 chocolate bars and 18 soda cans, how many chocolate bars and soda cans did Kayla buy in total?

### Response:
 Idadi ya chocolate ambazo Kayla alinunua ni chocolate 12 / 2 = <<12/2=6>>6 chocolate.
Idadi ya soda ambazo Kayla alinunua ni soda 18 / 2 = <<18/2=9>>9 soda.
Jumla ya chocolate na soda ambazo Kayla alinunua ni soda 9 + chocolate 6 = <<9+6=15>>15 vitu.