The Winter Dates I Bought Were Two Yuan More Expensive Than Others

I often buy some fruits at a fruit stall. Just because the fruit stall owners are an old couple who have no one to support them and are homeless. So when I buy fruits, I never ask about the price or weight. Until one time I discovered that the winter dates sold to me were two yuan more expensive than others. "Uncle Chen, why do you charge me ten yuan for selling winter jujubes to others for eight yuan per catty?" He said, "Because you are a kind-hearted teacher. You do good deeds to accumulate virtue for yourself." It turns out that they caught me and killed me...