[grond69]

I'm not being argumentative, and it doesn't really matter, but you can't buy offboard arty by individual tubes. if you select a battery (bty) it will show one line on the top display on the right, but if you look at the bottom display, you will see the 4 tubes that make up that battery. But it doesn't matter! You spent 2105 on arty and 3259 on non-arty (if my math is right). A core of 3259 allows you to spend 575 on arty for a total of 3834. If your opponent is awarded 50% of the overspend, then the AI should have got 765 points. Close enough to what you saw

Keep in mind, the AI CANNOT spent more than they are allowed (see Andy's note on how arty can be cheaper than you might think). So, if an advance is 2x for the attacker, then the AI spent 10,728. If it spent 6030 on non-arty, then 4698 were spent on arty. Assuming that the advancing side is allowed to spend 30%, then the AI overspent by 2114 points which should have awarded you 1057 points. Not even close!