I remember heading to a Korean buffet chain not far from where I live (in my country), in which they mainly cater Korean & some Japanese food (it has multiple branches) but the catch is that they’re charging customers the equivalent of 10 USD per take out container for food wastage if they want to take left overs (they’ve dealt with food deliberately being left uneaten before).
Over 50% of the food prepared for buffets goes to waste. Link
But if we consider that the food served at a buffet was 100% destined for the trash bin based on quality and then 50% of it got eaten, the numbers sound much better.