Nope. Never worked at a restaurant. But, I've shopped at a grocery store. And, do you know what they have at grocery stores. *cough* fucking bags of salad.
Also, rather than placing the ingredients to a salad in this robot's hoppers, do you know another way you could combine them into a fully assembled and ready to eat salad? Hand them to a THREE YEAR OLD and have him mix them. Or, you could toss them into a bowl and... do nothing, because BINGO! There's a salad.
Yep, you're welcome.