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

### Instruction:
Kim spends $25,000 to open a store.  She makes $4000 a month in revenue and her expenses are $1500 a month.  How long would it take to pay back the cost to open the store?

### Response:
 Faida ya Kim kwa kila mwezi ni $4000 - $1500 = $<<4000-1500=2500>>2500.
Itachukua 25000/$2500 = <<25000/2500=10>>10 miezi kulipa gharama za kufungua duka.