conversations.from: human
conversations.value: 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?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: Her profit is 4000-1500=$2500
  So it takes 25000/2500=10 months to make back the money