Most Hotels include breakfast in the accommodation so I am not including breakfast.
Casual Lunch (burger style) +/- US$8 to $12 per person Dinner Between US$20 and $40 per person at one of the hotels
There are other dinner options like the boma restaurant at US$60 per person, but lots of entertainment comes with that, or you can do things like a night drive and bush dinner or a dinner cruise on the Zambezi.
So there are a few options have you seen our page on eating out.
Victoria Falls restaurants it's not 100% complete as I am still waiting on full details from many of the restaurants but it will give you an idea of what is available.