Post-calculation

I suspect that Dexxter currently has more urgent matters to update. Have you seen this in other programmes, what you are proposing, because are you talking about your stock or your operating costs?
"Listing used goods and their cost price"? Personally, I wouldn't know what use that would be to me as a sole trader, but I am curious about your idea. When I read your title, I thought of an other "Post-calculation" ☺