This's a cool little math game that you have to change track junctions so that a mining cart picks runs the track and picks up money amount carrying mining moles and it ends up at a final correct amount. Kinda hard to explain, but fun to play and really helps your cashier money handling skills.
Guide the cart to the ore deposit displaying the sum of the two moles you pick up on the way. Click on the junctions to switch them. You can replay the level at anytime, but it will affect your star rating for that level.
How to play: