NOTE: Cost are for mod version 1.9.2 for Minecraft 1.2.5
If you are using an older version, please consult the text file that came with the download instead.
This is just one of the many aspects of the system, to make the enchantment system more balanced, functional and fun.



---COST ALGORITHM---:

Cost=math.min(levelCap,accumulative costs for enchantments);

-Every time a new enchantment is ADDED: the accumulative cost increases by 2+minimum level of enchantment.
-Every time an enchantment is UPGRADED: (e.g. unbreaking 1->unbreaking 2): 

The accumulative cost increases by the (difference in the enchantment Values)*(3/4);

	XP value of an enchantment=f(L)-f(L-7)

	where L=min-enchantability level of a given enchantment (from 0 levels).

	f is a function that returns the number of EXPERIENCE POINTS required to reach a given level



-----MIN ENCHANTABILITIES-----

        ENCHANTMENT                     LEVEL
                              I    II   III   IV   V


Protection                    1    12   23   33   
Fire Protection               7    13   18   22   
Feather Falling               5    11   16   20   
Blast Protection              4    10   15   19   
Projectile Protection         1    9    14   18   
Respiration                   7    15   21   
Aqua Affinity                 1    
Sharpness                     3    11   18   24   30   
Smite                         3    9    14   19   24   
Bane of Arthropods            3    9    14   19   24   
Knockback                     1    9    
Fire Aspect                   7    22   
Looting                       18   27   35   
Efficiency                    1    8    14   19   24   
Silk Touch                    23   
Unbreaking                    5    15   22   
Fortune                       18   27   35   
Power                         1    9    16   22   28   
Punch                         1    10   
Flame                         14   
Infinity                      19  

-----Item Enchantability bonus----

[*] On initial enchant: 75% (of the item's enchantability +1);
rounded down;

[*] On upgrading an enchanted item: 50% of the item's enchantability;
rounded down




---Max Enchantment Costs---

Player's xp        MAx Cost         
<10               (no change)                
<25                    9                          
<40                    7                          
<55                    6                       
>=70                   5                      


--CALCULATING LEVEL CAPS, given a level, and the player's XP

limitForSubCap=Math.min((Player's XP,30)/1.5;

If(chosenLevel<limitForSubCap){
       LEVEL CAP=chosenLevel/limitForSubCap*(Max Cost For Player's XP);
else{
       LEVEL CAP=(Max Cost For Player's XP);
}

LEVEL CAP=Math.min(LEVEL CAP, Chosen Level);