Think of it in this way-
Germany produces 10000 Volkswagon Cars, 25000 Opel Trucks, 50000 Washing Machines/Vaccum Cleaners etc, 5000 Induction Furnaces of 5 MT and more, 10000 Lathes of various bed lengths and 10000 of milling machines, surface grinders, drills etc (machine tools).
But it lacks 2000 OIL needed to produce - Tanks, Planes etc.
What it does is it sells its Cars, Trucks, Washing Machines and Machine tools to Romania, USSR, USA and buys that oil. This is what happened in Real Life too,
From wiki- (this is only for the Calendar Year of 1940) and between Nazi Germany and Stalinist Russia -
On February 11, 1940, Germany and the Soviet Union entered into an intricate trade pact in which the Soviet Union would send Germany 650 million Reichsmarks in raw materials in exchange for 650 million Reichmarks in machinery, manufactured goods and technology. The main raw materials specified in the agreement were one million tons of grain, 900,000 tons of oil and more than 500,000 tons of various metal ores (mostly iron ore) in exchange for synthetic material plants, ships, turrets, machine tools and coal.
The Soviets were to receive the incomplete
Admiral Hipper-class naval cruiser
Lützow, the plans to the battleship
Bismarck, information on German naval testing, "complete machinery for a large destroyer", heavy naval guns, three 38.1 cm (15 inch) twin turrets to defend ports, preliminary sketches for a 40.6 cm triple turret, working drawings for a 28 cm turret, other naval gear and samples of thirty of Germany's latest warplanes, including the
Me-109 fighter,
Me-110 fighter and
Ju-88 bomber.
The Soviets would also receive oil and electric equipment, locomotives, turbines, generators, diesel engines, ships, machine tools and samples of Germany artillery, tanks, explosives, chemical-warfare equipment and other items.
