rebate
n
amount by which a debt, tax, etc can be reduced; discount or partial refund (债、 税等的)可减免的款额; 折扣; 部分退款
qualify for a rate/rent/tax rebate 有资格获得房地产税[租金/所得税]的部分退款
offer a rebate of 1.50 for early settlement, ie of an account, a bill, etc 及早结帐有1.50英镑的折扣. Cf 参看 discount1.
I suggest that we ask users of this machine what they think about it. We can photograph them using it too. Then we can put their comments at the top of the advertisement in big print. We can bring in some humour too. People enjoy reading humorous ads.