Purchasing and inventory
I calculate stock turnover for every SKU. A category average hides the spread: within one category some lines sell out in a week while others sit for a year. What that stock costs, I worked out in the article "Selling what isn't there". The median Moscow pharmacy does not hold in stock 78 of the lines that an online booking storefront shows for it. For a chain of 50 pharmacies to cover those lines from its own stock would take 3,900 packs, or 2.54 million rubles at purchase prices. At a short-term borrowing rate of around 18% a year, that stock costs roughly 457,000 rubles a year. Turnover has to be calculated from exports of the chain's own inventory system: there is no ready-made calculation on track-and-trace data yet.