NIVEA 这次跟 以前都不同, 你看看这个, 希望有帮助:
Here is what I have gleaned with the help of some posts here on SD and some
personal experience. Hope it helps!
Nivea does not seem to be carrying over anything over $15 in a single
transaction. For example, I bought 16.97 in one transaction, but only got
credit for $15. However, if you split your first purchase up a bit, extras,
up to $15 total, will carry over. For example:
first transaction: buy 1 BW @ 4.88.
credit towards deal, 4.88, amount needed 10.12
second