花冤枉钱 meaning in English

spend money to no avail; throw money away

So , if you don ' t bargain , you ' ll surely pay more than necessary
因此，如果哪个顾客不讨价还价，他就一定会多花冤枉钱。
Can you only go step 1 or 2 right now , but want to make sure you do not spend money in the future fixing a mistake you make right now because of your limited budget
那么，你可以只做改装的第一步或第二步，而同时又确信，将来不会为更正今天因预算的限制所作的某项错误投资而花冤枉钱呢？
A ? 225 , 000 scheme advising the elderly on how to wear slippers is among an array of examples of " wasteful and useless " government spending costing billions of pounds a year , researchers say
建议老年人如何穿拖鞋竟然花费了英国政府22 . 5万英镑？这听起来似乎是天方夜谭，但事实的确如此，而且这只是英国政府众多“大手大脚花冤枉钱”例子中的一个。