I have been taking photos of all my clothing & accessories & entering them into the Stylebook app. I have a few gripes with it, but generally it seems to be more comprehensive than any other app I've seen.

My question is what is the best way to track items that were bought & worn many times before starting to use the app? Some of my clothing is going strong after many years & many wears. Putting the original price, even if I could remember it, wouldn't work. Just guessing the price & dividing it by the (guessed) number of wears seems to be the only way to go. Am I missing something? Have you found a way around this to have CPW reflected as accurately as possible? Should I use a depreciation formula after so many years it doesn't need tracking? Or should I just keep using my spreadsheet?
Thanks for any help