After booking a reservation online and seeing my o...

After booking a reservation online and seeing my one week total of 306$, I arrived at DFW airport. I waited in line and was greeted by a lady behind the counter. I asked if this additional charge could be taken off the reservation and I was informed that this was the minimum I could be charged for this vehicle. After signing the receipt I get back to the terminal after my trip and see that there was an additional 31$/day charge on the ticket. I said I thought this was the minimum? Minimum would be asking me if I would like to waive additional insurance. I m on a business trip, so. It only do I have insurance myself my company is covering me in case anything happens. No option was given to me to waive the insurance and no insurance of mine was ever asked for. Slimy way to make an extra 150 for your company. I will no longer use dollar rent a car.