When allocating food cost (in your costs) 36% is around where you want it-30% would be more ideal, but you can get that through sales, bulk discount etc. So, regardless of volume food cost % is basically where it should be.
Some numbers in spain: slice cheese .19/slice bread .08/ slice (.16) Margarine (because: costs!) .04/10g .39
To get closer to a feasible food cost you’d have to sell at 1.25
WhatsApp was its own company, took advantage of an open market in EU where SMS (and “international” phone calls?) were extra rate charges on mobile phones. Once every one got accustomed to using whatsapp Meta took it over and now we’re stuck with it.