84 - 99= 130539525
84-99=149379
You will need 150k willow logs to get 99 firemaking. I suggest using maples and yews after because it is faster.
It would take exactly 2555 willow logs.
144, 679 willow logs, which equals to 2,025,506 GP if you want to buy them all.
It takes approximately 1.5m willow logs to get 99 FM starting from 30 firemaking...i recommend doing willows until 50 FM, then buy about 100k maples...and u should be about set =P
It would take round about 120k willows, or you could do 60k willows and 50k maples which saves time -------------------------------------------------------------------------------------------------------- (EDIT) Right Answer: About 100k Willow Logs.
1,187 - making willow short-bow's (u), may require less if you change to willow longbows (u) when you get to 40 fletching.
1,021 Teak logs to get to 60 FiremakingFrom 60 Firemaking to 99, 63,016 Yew Logs.Note: this is the mid price optionThe most money saving is:122,551 Maple Logsor142,976 Willow logs, however this can still be dear.
this will entirely depend on how many hours a day you plan on training with these and what your current firemaking level is.
You are looking at 131,378 Willow Logs.
From level 15 - 30 ( Using oak tree's to get to Willow Tree's ) you will need - 10,952 XP = 293 oak logs. From level 30 - 60 ( Using Willow Tree's to get to Yew Tree's ) you will need - 260,379 XP = 3,858 Willow Logs. best place to cut is around the draynor village jail.
I would strongly recommend using diffrent logs if you can but otherwise it probably would take at least maby 2m 1m logs which i have no clue i just like to help people with runescape
96,551. :) good luck