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

### Instruction:
 Elise ananunua chakula zaidi cha mbwa. Ananunua mfuko wa kilo 15 kisha mfuko mwingine wa kilo 10, na sasa ana kilo 40 za chakula cha mbwa. Elise alikuwa na kilo ngapi za chakula cha mbwa tayari?


### Response:
 Mifuko miwili ya chakula ina uzito wa kilo 15 + 10 = 25kg
Uzito jumla wa chakula cha mbwa ambacho Elise alikuwa nacho tayari ni 40 - 25 = <<40-25=15>>15kg