I've booked a rental with pick up at 11:30 am on a Mon and returning at 11 am the next day. I chose the e-toll unlimited option. It says this is charged "per day". Is that a 24 hr period, or will I get charged for Mon and Tue on my just under 24 hr rental? I suspect it should be only one day's charge as that's what shows in the cost in the conf email, but car rental companies being what they are, I figure I'd ask.