The fees they charge are not unreasonable.

他们的收费还算合理。

《牛津词典》

However, it would be unreasonable to charge nothing against profit for the use of the machine.

然而，对使用机器而言，不对利润扣除费用是不合理的。

youdao

Unreasonable medical charge would influent economic benefit in hospital. Therefore, reasonable medical charge is the bases of hospital.

收费不合理将直接影响到医院的经济效益，因此，科学合理的医疗收费是医院生存的基础。

youdao

The Department of Labor, which oversees retirement plans, has been working for years on rules that would make it easier to tell which 401(k) plans charge unreasonable fees.

FORBES: Will We Ever Find Out What We Pay In Retirement Fees?

The government's advocate for access to education Simon Hughes added that he thought it would be "unreasonable" for universities to charge students "significantly" more than the cost of providing their course.

BBC: Business questions