I liked the idea of this spreadsheet, actually inspired me to create my own.
I added/deleted some of the headings to fit my liking, my spreadsheet looks something like this:
No.| Name | Item type (eg pants) | Sell Attempt | ($) Cost (b/o price) | Sell Price | Revenue | Profit | Profit % | Item stats | Date listed | Date sold
The sell attempts is a good idea to track items that are not selling.
The sell price is to record the amount it was listed for (which i always seem to forget when it comes back unsold).
Revenue data is straight taken from the auction tab, hence deductions already pre-calculated.
Profit = revenue - cost (b/o price). Personally i auto convert the gold to $ at the prevailing market rate.
Profit % is a good indicator for profitable item types to sell.
Items stats for tracking purposes
My only gripe is not having an auto-sort button on the headings (dunno how to make it lol), I had to resort to the manual way of right-clicking and sorting everytime.
I downloaded yours but not sure if that feature is already in place cos i get errors loading it.