I've run into many customers not understanding exp rates
please refer to the exp table listed here:
https://oldschool.runescape.wiki/w/ExperienceI know some of you will find this extremely simple, but I've been consistently running into people that have trouble understanding ratios.
Feel free to link them this thread.
Please read and follow along with the following hypothetical scenario
Example:
Say you want 80-99 combat, and are quoted 12 gp/exp as a price
use the above wiki link to determine exp difference
level 80 = 1,986,068 total exp
level 99 = 13,034,431 total exp
difference = 11,048,363
so you can use the ratio 12gp/exp and multiply by the experience difference to determine the price
11,048,363 exp * 12gp/exp = 132,580,356 gp.
Therefore 132,580,356 gp would be the final price to train from 80-99 combat.