i made this for myself and thought why not share it. if you notice any inaccuracies post here and ill fix it or you can just do it yourself :P
features:
favor needed for max reduction in learning time calculator
xp to favor calculator
favor to xp & item calculator
item to favor calculator
vendor sell prices & auction price equal to tool vendor profit calculator
achievements checklist
pretty colors
google docs (preview)
>>> http://bit.ly/favorfultoolv3 (download)
note: use a program that can read .xls. openoffice has a free one or you can import into google docs, make sure it's for you only because trolls can come mess up the formulas.
extra note: if you want the unprotected sheet just press unprotect, i didn't set a password.
props to Zu for his favor to seconds forumula in his helpful favor guide and SacredBob's achievement list.