Reason Code Report

I sell a perishable product, therefore I need to be able to track product that has perished. In the help menu, under reason codes, it states, the information is stored for use in tracking and reporting. That is why I chose this method to record dead plants. Now I need to know the cost and profit lost of these dead plants, as well, I don't want to purchase them again. So how do I get the information???? I read about a guy tracking dead fish by making the item inactive, although he was having trouble, should I change how I track this info for the future? I would greatly appreciate help to get last year's report. Thanks