I can't imagine it's that much. Here it says $30 for 5lbs, http://store.makerbot.com/plastic.html http://store.makerbot.com/plastic.html How many cubic inches

I can't imagine it's that much. Here it says $30 for 5lbs, http://store.makerbot.com/plastic.html http://store.makerbot.com/plastic.html How many cubic inches does five pounds get you? Hopefully many?