Current weekly challenges mathematically impossible to complete?

Its the Shopkeepers Challenge that gets me. Its the evening of the 9th here in China and I only have 7 skeletons squished. I don't think I will be getting my donuts this week. Even the friends I have are not actively sending terrors to me. They are hit and miss. Without the brown house, there would be no skeletons, so why continue it when the chances are nil that you will get the donuts.