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

### Instruction:
 Jana, Vincent alinunua pakiti kumi na tano za stika. Leo, alinunua pakiti kumi zaidi ya jana. Vincent ana pakiti ngapi za stika jumla?


### Response:
 Kwa kuwa Vincent alinunua pakiti 10 zaidi ya stika leo kuliko jana, alinunua pakiti 15 + 10 = <<10+15=25>>25 za stika leo.
Jumla, Vincent ana pakiti 15 + 25 = <<15+25=40>>40 za stika.