Ran into a similar scenario. booked a week long rental for, say $200. the rate would've been 350 had I added 1 additional day upon booking.
Contract gives me $28.50 for the ex. day (which equals to around 1/7 of the weekly rate), Hertz online extend-your-rental tool is trying to charge me close to a $100 for an additional day.
Should I just return a day late & be charged the ex. day rate on the contract?