How many calories are in a slice of tomato Pie (philadelphia style)?!

I'm wondering how many calories are in a single square slice of tomato pie (philadelphia style)...aka. It is just sicilian style crust, yummy sauce and a light sprinkling of parmesan cheese on top. This is nothing like most southern-style tomato pies with mayo and lots of cheese, the flavor is all in the soft crust and sauce. So someone out there, do you know the calories for one of these?
This is what I'm talking about:
http://s50.photobucket.com/albums/f327/MoBlondeArt/?action=view&current=TomatoPie.jpg