Use this spreadsheet to track trades and see what items are working best. The "Statistics by Item" and "Statistics by Date" tabs give you the most useful information. This spreadsheet is made to handle an unlimited amount of data without being edited i.e. you will never come to a point where you have to paste formulas down or across to continue adding data.
Instructions for use: Fill in everything under blue (Item Name Quantity Buy Price Sell Price Date); the rest is automatic. I have some of the under-blue filled already out so you can see how the spreadsheet works. You should of course delete these data when you download it for yourself. Make sure you only delete what's under blue.
Download instructions: Open the spreadsheet by clicking the link, then hit "File" and "make a copy." You must be logged into Google Docs to be able to do this. The spreadsheet only works on Google docs because it uses functions that only Google Docs understands.
https://docs.google.com/spreadsheet/ccc ... EIyLWJCOXc
If the first link doesn't work, try this one: https://docs.google.com/spreadsheet/ccc ... lNWN1pnbFE
Note, if at all possible, download the one up top, since the one below may be outdated.
Note to moderators: my old spreadsheet post can be deleted.