That's actually pretty normal. For most car rental companies, the weekly rate is equal to 5 days. So the two extra days likely weren't supposed to cost any mo

That's actually pretty normal. For most car rental companies, the weekly rate is equal to 5 days. So the two extra days likely weren't supposed to cost any more. (It's a form of price discrimination: business travelers insensitive to cost typically rent for 4-5 days at a time, while personal users can get a better deal on a weekly rental.)