Something I need help with:
I need upkeep costs for these vessels:
Aircraft carriers should cost 6, for reference. I am using international Credits, or C, which is roughly equal to 1 billion modern USD. 
Aircraft Carriers	
Battleships	
Battlecruiser	
Pocket Battleships	
Heavy Cruisers	
Light Cruisers	
Destroyers	
Torpedoboats	
Motor Gunboats	
Minelayers	
Minesweepers	
Escort Carriers	
Monitors	
Frigates	
Corvettes	
Submarines	
Armed Merchant Cruisers	
Merchant Raiders	
Q-ships	
Merchant Aircraft Carriers	
Tanker	
Passenger Liner	
Bulk Carrier	
General Cargo Vessel