Sorry for not clarifying.
In this thread, I am offering 15 percent off from my eBay listing priced with free shipping.
Recently, I set 10 percent off for my eBay listing and it gives reducing the price. What I am trying to say is the 10 percent off at eBay isn't combined with 15 percent off at my thread.
For example, Original price is $249.99, with 10 percent off at eBay. It's showing $224.99, but 15 percent off from this thread will go to original price instead of subtracting from 10 percent off. It will be $212.50 based on 15 percent off on original price for this thread.
I was able to explain clear.