Something wonky is going on with the math in this game. I have just returned from a mining run with diamonds and opals. Had 130 mill in the pocket. Sold the diamonds that showed 100 mill total and opals 50 mill total. You'd think i would end up with 280 mill in the pocket? nope. I was left with 230. So... 50 mill just vanished. Is there a tax or something?