Gallery Exhibit Help! (Image selection, pricing, etc.)

I just had an interesting development in my photography hobby: A gallery owner contacted me and asked if I would be interested in doing an exhibit in his gallery!

Obviously, I was excited and told him that I would be interested. Nothing is finalized, and in fact I do not have many details at all. What I have:

-His gallery is in a resort town in the mountains in Colorado. (until I finalize it I am reluctant to give out many specifics)
-He liked my web gallery enough to contact me.
-He asked me to bring in a portfolio (11x14) to evaluate the quality of the prints.
-The timeframe for the exhibit would be late summer, and the exhibit would last 1 month.

I have a lot of questions:

1. Where do I start? I don't have much of an idea on what to include in my printed portfolio, and need some help choosing images.
( www.adampenderphotogra​phy.com )
2. How do I choose what to exhibit? What is likely to sell? This might be different from the printed portfolio that I bring for the "show and tell".
3. How do I choose what size prints (and how to frame them) for the exhibit?
4. How do I price them?

I have some ideas, but I would definitely value the opinions of the experts (and hobbyists like me) here on the forum. I appreciate all the help I can get!

Thanks!

The gallery owner can help with print size and pricing as well as which ones once your in the door.
In your portfolio you want a mix of your best images.