conversations.from: human
conversations.value: Can you explain how to solve this math problem: On Friday, Hank opened his used-bicycle store with a stock of bicycles, all fixed-up and ready to ride. Over the course of the day, he sold 10 bicycles and bought an additional 15 to fix up. On Saturday, he sold 12 bicycles and bought 8 more. And on Sunday, he sold 9 bicycles and bought 11 more. What was the net increase in the number of bicycles in stock in Hank's store over the three days?
conversations.from: assistant
conversations.value: He sold 10+12+9=31 bicycles.
  He bought 15+8+11=34 bicycles.
  He now has 34-31=3 more than at Friday's opening.