Calculate the cost to achieve certain XP or level milestones.
Firemaking
Prayer
Construction
Runecrafting
Crafting
Hunter
Agility
Smithing
Farming
Cooking
Bonus XP (Start) means the bonus XP is obtained before ever training the skill.
For example, the bonus Agility XP from Fishing allows you to skip the early Agility levels.
Bonus XP (End) means the bonus XP is obtained at the end, so the slow, early XP rates are not skipped.