@Rescue55-joe I believe the “10 IPCs for each country” that you are referring to are actually the National Control Markers, which are used to track both conquered territories and national production levels. As barnee pointed out, IPCs are not physically provided, and the Rulebook instructs us to track them on paper, but any proxy (such as Monopoly money) will do. See page 7 of the Rulebook for details on both National Control Markers and IPCs.
In a nutshell, the National Production Track is used to chart your “income” using a National Control Marker. and every turn the “money” goes into your “bank account”, which is represented by IPCs, where it can be spent on new units (or saved for later).
I hope this helps.
