Quick 3 things:
1) DEN does not produce any iron.
2) Relations do not matter when buying/selling stuff.
3) Capis/factories etc do NOT take goods from your stockpile, they must buy their own, so if they are short on cash they can't buy it. The only time goods are used for building factories/railway is when the government manually builds it, and even then the factories must buy their own day to day inputs.
1) DEN does not produce any iron.
2) Relations do not matter when buying/selling stuff.
3) Capis/factories etc do NOT take goods from your stockpile, they must buy their own, so if they are short on cash they can't buy it. The only time goods are used for building factories/railway is when the government manually builds it, and even then the factories must buy their own day to day inputs.