They have a counter with various kinds of cooked food like mushroom, cous cous, vegetables, meat items, etc where customers can select.
I was watching how they work while waiting for a friend the other day.
A lady came and wanted to order something from the counter.
The staff took a porcelain plate and placed it on the weighing scale.
He looked at the weighing scale as if he's checking the weight of the plate.
She selected a dish and he scooped a spoonful on the plate and place it back on the scale. He checked the weight, pressed a few buttons on the scale and a white label appeared from the side. He took and pasted it on a piece of paper.
She chose another dish and he repeated the whole process.
From the way how things are done, I would assume that all these dishes are charged by weight and the prices for all the items are different. That explained why he needed to repeat the same action for each dish ordered.
This is exactly like what I usually do when I buy vegetables at the supermarket where they are priced by weight. For example, you are buying carrot. You pick the number of sticks of carrot you want into a plastic bag and then place it on the weighing scale, select carrot on the screen and out comes the price label based on the weight.
Halfway through, she changed her mind and decided to separate the two dishes into two plates.
The staff took out two plate, placed one on the machine to check and scooped one of the item over. and check the weight on the machine again. He then do the same to the other dish.
Every plate should weigh similar if they are manufactured in a automated factory although there may be a negligible difference.
Why then did he weigh every plate? Or was I mistaken about his action?
The lucky thing is that the cafe is seldom crowded and the staff can afford the luxury of repeating the action.