Um, this is pretty much impossible to say. There are MANY different ways to get to 99. I could craft 1k airs, then craft 1k nats, then suddenly craft 10k fires, then craft another 1k airs, then craft 100k astrals, then craft 100 chaos runes, then craft 20k water runes, etc etc. Why dont you just do the math. If you have 86 wc or something, find out how much xp is needed to 99. Say its 8mil form 99 (again, this is an estimate). If yew logs are like 200xp each, then do 8m/200 to find out how much yew logs you need. Once you find out how much you need, you multiply that by how much yew logs are worth, and bingo, your done how much woodcuting would make if you cut YEWS.