表达有没有错误?

题目

表达有没有错误?
They want to use the signals on the servo drivers by an external device to monitor and increase this kind of function,assuming that,
 .What should we do specifically on this matter when we redesign?
 How much money do we spend on this issue probably?
They show willing to do so if the price and workload are acceptable

答案

最后一句应该改为：They show willingness to do so.或者 They are willing to ...