Ben 1 yuan

10 yuan earned money.

1.5* 10= 15

15- 1 (this is a complimentary bottle) = 14 yuan (the rest of the gift)

14 yuan

If there is no gift.

Not many people buy it, because they can only drink one bottle when they buy it, so no one buys it.

But people who give gifts and buy them will think, what if they win?

So there are many.