I'm guessing you mean the price per frame?
A roll of Ilford 120 film here is about £3-£4, that gives me either 8 frames on my Zeiss folder or 15 on my Bronica. Or the same outlay on a roll of 35mm film gives me 38 frames in the MX.
I just tend to keep medium format for the more serious stuff and use 35mm for experiments. If a location works well I'll be back with the Bronica to get higher quality shots.