In the global game you will have two charts. One from Pac, and one from Europe. Use one for tracking income, and the other for tracking NO’s. You can even fit the US war time bonus in, problem solved
With that said,we will use a home made tracking chart, and just wright things down each turn. It makes things easier. With as many powers as there are in this game its the best way. We normally track tt income, NO income, convoys (-), war bonds income (if your playing w/tech so you don’t forget), along w/tech for each power. It also allows you to look back to see if you have any questions from previous rounds, or to look at progress or regression. Using an ipc chart is just asking for trouble IMO, at some point its going to hit the floor.