There is no way, unless you add all your XP up.
The total exp is 13,034,431 experience for a 99 stat on RuneScape.
13,034,431 EXP
400 exp.
you will need a total off 7,842 exp in that skill.
75 exp each.
you get 9 billion exp when you make a cake
30 each
175 exp
No, any item gives the same exp.
920 each
You have to be a member or have 1.5 million total exp
12.5 Smithing experience