We currently have a promotion program. once the card is complete with eight stampings, one customer will be treated free of charge.
用stamps或stampings，都可以。stamps/stickers侧重于贴票，stampings侧重于盖章。
1、您是老客户,所以报的价格都是最优惠的
You are the old customers, so the price is the most favorable
2、考虑到您是我们老客户，我们每吨货最多还可以给您额外优惠500美金。
Considering you are an old customer, we will take extra$ 500 off perton.
希望对你有用、
