Annual Collection

"How do you sell these roasted sweet potatoes?" I asked, pointing to a circle of burnt red sweet potatoes on the oven. The old lady sat on the tricycle, slowly picked up the steel scale, picked a medium-sized roasted sweet potato, put it on the scale and weighed it, "A big one like this costs seven yuan, a smaller one costs five yuan, and the larger one is more expensive. Girl, which one do you want?" I smiled and said, "Can't it be cheaper?" The old lady was a little helpless, straightened her headscarf, thought for a while, and said slowly, "Okay, to wish you good luck during the New Year, I'll give you six dollars for this, okay!" I just continued to laugh, and didn't buy it. Instead, I chatted with her about common things...