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Only the dark blue and red cells are open for editing in the calculators, the rest of the cells are locked to prevent tampering. You can download the Excel file below or click on file>download above. Once downloaded, additional formulas used in the calculators can be found in hidden sheets. Just unhide them.

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Many of the formulas used in these calcs are from the following forum post:

http://services.runescape.com/m=forum/forums.ws?317,318,712,65587452.

These calculators can also be used in PvM scenarios. Look up the monster's stats online and fill in the blanks. If you want to do this, I recommend reading the forum post because it will make manipulation of the calculators easier to understand.