I think it works out to be about $20/day without reservations. It's cheaper, if you book online, maybe more like$16/day, and cheaper if you buy the Groupon to use, like $13/day. For whatever price you see, add $4-5, including the Groupon, for various taxes and surcharges. Like the Groupon says $8/day, but you pay an extra $5/day when you're checking out. Read all fine print.
Also fepends on which lot and service you use.
Look around for the best deal
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