How Much $ To Rent Tables And Chairs

This might be a silly question, but, I have no idea, so I`m asking. Approximately how much does it cost to rent tables and chairs? My best friend in the whole world (we have been through so much together) just told me that she and her bf are engaged and plan to get married next summer. They really don`t have any money and I could tell how sad and disappointed she is at not being able to have any type of real wedding, they are going to JP to get married and spending what money they do have on an apartment and a honeymoon at a NH lake area. It hurts me because she`s my matron of honor and very involved in all my wedding preparations. My fiance (he`s so great) suggested that we could give them a reception or post wedding party. I`m counting on about 50 guests and my mom and my sister and I can certainly do the food and decorations. We can get a function hall for next to nothing, but the only hitch is we have to rent tables and chairs. Hence...my question. I`m trying to get the finances down because I`d like this to be my Christmas present to her.