租车条款，请帮忙解释一下，谢谢

在租车条款中有关取消有这样的条款，对红色部份理解有点不明确，请各位帮忙解决呢

CANCELLATION

Cancellations or No-shows incur a $50 admin fee, and the residual is refunded back to the original card. (see below for exceptions)

All pre paid amounts are non-refundable once the rental has started.

No refunds provided for unused days.

In addition to the above fees Thrifty reserves the right to charge $220 cancellation fee for Standard vehicles and $330 for 4WD's, Buses and Trucks if not cancelled 7 days prior to pickup.





还有以下这段关于事故责任的：

Thrifty: The Single Vehicle Accident (SVA) Liability Fee is waived for rentals from a metropolitan location. Otherwise, the amount is $2,200 and can be reduced at the time of pick up for an additional fee of approximately AUD$33 per day at most locations. The fee is unable to be reduced on the Max Cover option (from non metro locations).