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

### Instruction:
Shelby was having a movie party for her birthday. She and her mom made a dozen bags of buttered popcorn and 10 bags of caramel popcorn. Her brother Alan took 3 bags of buttered popcorn and 1 bag of caramel popcorn for his friends. How many bags of popcorn does Shelby have left for the party?

### Response:
 Shelby na mama yake walifanya mifuko kumi na mbili ya popcorn yenye siagi + mifuko kumi ya popcorn ya karamel = <<12+10=22>>22 mifuko.
Kati ya mifuko hiyo 22, ndugu yake alichukua mifuko mitatu ya popcorn yenye siagi + mifuko moja ya popcorn ya karamel = <<3+1=4>>4 mifuko.
Idadi ya mifuko ambayo Shelby ana iliyobaki ni 22 mifuko - 4 mifuko = <<22-4=18>>18 mifuko.