Spread Sheet - Prospecting - Jewelcrafting - Disenchanting
Calculates profit from,
Works well if you have any of the above professions, preferably 2.
Remenber is is all about theoretical so do not count on it to be correct if your only doing 10 stacks.
100+ stacks you can sorta count on it.
Link is: excells.net
More spreadsheets and gold guides to come in future!
Same download link, much better calculations!