How it works:
- Any amount which is in excess of a 10k mark goes straight to storage
- All other resources are provided back in the form of Food and Iron bundles
For example, if you were to be getting 568,161 food back you would get:
- 1x 500k bundle
- 1x 50k bundle
- 1x 10k bundle
- 8,161 food to storage.
My previous message @rigs was just a guess (a wrong one as it turns out) 
