If you knew exactly how much you were going to sell in the future of each of the items you stock, you could definitely reduce your inventory, right?
That precise knowledge of your upcoming demand would mean you would not have to keep “buffer stock” in your inventory for unforeseen sales spikes. On the other hand, by stocking exactly what your customers were going to buy, you would also not have any out of stocks, so you would not lose any sales from not having product in stock.