No Insulation?

Today a guy came to the house to inspect it for energy efficiency. Daniel applied for a government program where you can get the inspection and they will fix everything for free, no matter what is required. They replace light bulbs, insulate around windows and doors, and even replace your refrigerator and other appliances if they're really inefficient. Within an hour of being there he discovered that our basement has NO insulation! NONE! No wonder it's always freezing down there! I can't imagine how much money we are wasting trying to heat the house while it's all just escaping downstairs. What really bothers me is that we didn't know this. We had an inspection of the house before we bought it, why didn't this come up? Isn't that something the inspector would have noticed? I'm sure we would have asked the seller to fix that, or at least Daniel's parents would have taken care of it before we had to endure weeks of weather in the single digits and even below zero. I can't wait to see how much the temperature in our house improves after we get insulation in the basement. And I can't wait to see how much our energy bill goes down! Last month it was almost $150.