What is the cheapest parking at Portland airport?

I'm out of Eugene......I'll be leaving my car for a week...|||on the sidewalk|||rent a car to drive up there and drop it off at the airport, depending on how long you stay, it could be cheaper. i live in salem and have done that before|||Park in the airport extended lot just before the airport. A shuttle bus will pick you up and drop you off. We use it all the time. $9.00 per day