Not sure what the numbers will be, but I lost a LOT of iron because my iron storage was always full. Iron from raiding, iron from titan loot, iron from Wanted mission chest, all that iron, just … lost.
I was able to hoard food ( Note 1 ), so when I run out of iron with two builders, I can take some of my food hoard and increase my mines, or when my mines are all 20, my watchtower.
Note 1
As an aside, I currently have too much food, due to lack of ascension items, recruits and good 5* heroes, so I have not touched my farms since April 13th ( about ten days ).