This local build has no password login — each workspace is protected only by a workspace key held in your browser. Not suitable for public multi-user deployment as-is.
A made-up wholesaler with a handful of products, so you can see the whole flow with no upload of your own.
GBP, excluding VAT. Upload previous costs, new costs and selling prices — or one combined file that contains more than one of these. Nothing is renamed or rearranged first.
Uses an explicit comparison date so future-effective costs are labelled as upcoming, not blended in.