Answer:
60,000 air conditioning units
Step-by-step explanation:
Using the graph showing in the attached picture below, we can simply go to the vertical line that indicates 6,000 railroad engines and follow it to where it meets the diagonal red line. Then simply follow that vertical line down to know how many air conditioning units Germany can produce in this scenario. Since it lands on 6 and the air conditioning units are measured in the tens of thousands then they would be able to produce 60,000 air conditioning units if they build 6,000 railroad engines.