能的话，是先进Bing再进Lenovo SPP吗？还有什么rebates可以连用？
BCB的FAQ说可能不可以：
What's the deal with coupons or specials at the store?
The cashback program terms and conditions state that coupons ”could void“
your cashback rewards. Some stores may allow purchases made using coupons to
earn cashback. Your best bet is to check with the store before making a
purchase. We need to comply with the policies of stores that ask us to
cancel a cashback reward because a coupon was used.
