Many of her counters are outsourced to others. Different merchants, different profit margins and discounts are of course different.
But a low discount is not necessarily cheap. Maybe her profit margin is high. For example, profit 100%, a 50% discount is a loss. But if the profit is 1200%, 1 discount is also profiteering.
The key is to look at the goods. Now the price of jadeite is too high. I don't know how to do it. I sell high-priced goods carefully.