Hi Trevor!
It depends on how much you eat, of course. Personally I don't think I spend a lot, maybe around 150-200 p/month. If you're interested in a total approximate expenditure per month (incl. food, transport, etc but excluding the housing) then it's around 400-500.
However again, There are some people who spend only 200 p/month.
It depends which campus you're talking about. As for Deventer, there are 2 campuses, where in both you share a bathroom/kitchen, but have your personal room. The campuses are fully equipped (furniture, kitchen appliances, bed sheets).
Hope you have a good idea now!:)