Required cast irons for new technology levels

How much İron u need for the new Techs
Lvl 0  =  2   İron
Lvl 1  =  4   İron
Lvl 2  =  6   İron
Lvl 3  =  8   İron
Lvl 4  =  10   İron
Lvl 5  =  12   İron
Lvl 6  =  14   İron
Lvl 7  =  16   İron
Lvl 8  =  18   İron
Lvl 9  =  22   İron
Lvl 10  =  31  İron
Lvl 11  =  41  İron
Lvl 12  =  54  İron
Lvl 13  =  68  İron
Lvl 14  =  86  İron
Lvl 15  =  106   İron
Lvl 16  =  129   İron
Lvl 17  =  155   İron
Lvl 18  =  184   İron
Lvl 19  =   217  İron
Lvl 20  =   254  İron
Done .
Total = 1437 cast irons.
Good luck, its always better to do lower level upgrade with copper coins and till then keep looking for salw in shop to grab all other cast irons on 50% dicount. Get the required cast irons cheaper and upgrade to max or your desired level.
Good luck.
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