The only drawback of putting potatoes in the fridge is that the flesh goes a darker colour. Fortunately I have a cold cellar. But when I lived in a apartment, I used the fridge to stop them from going bad. I wish you could have a third compartment in the fridge for not so cold storage. I don't like the way some fruits go if in the fridge but hate having them go moldy so quickly in the summer.
Your grocery spending is awesome!