To start with, you should never be putting mustard or vinegar in potato salad!! Yuck!!
I would give about 4 ounces each - about 38 pounds
For a potato salad dressing serving 200 people, you can use approximately 4 cups of Miracle Whip, 1 cup of mustard, and season with 2 tablespoons of salt, 2 tablespoons of pepper, and 1 cup of sugar. Adjust the seasoning to taste, as preferences may vary. Mix well and taste to ensure the flavors are balanced before serving.
Approximately 4.5 quarts in 5 pounds of potato salad, including hard-cooked eggs.
I would make 25 pounds of it.
That is 87.5 pounds
Unless you have a recipe which substitutes the mayonnaise with something much healthier, then no...
That depends on the recipe you use.
Depends what else you put into it. I would make about 130 pounds of salad from 100 pounds potato as I add eggs, onion, bell peppers etc.
Generally speaking, 5 lbs of potato salad will fee 30 people. 12 people would be a little over half of that, so around 2.5 lbs of potato salad.
I would add more potatoes. or chuck it.
For a gathering of 20 people, it's generally recommended to prepare about 1/2 cup to 3/4 cup of potato salad per person. This means you should buy around 10 to 15 cups of potato salad total, which translates to approximately 2.5 to 3.75 quarts. Adjust the quantity based on the overall menu and whether potato salad is a main or side dish.
You should plan for about 1/2 cup per person. That make 250 cups which would be just under 16 gallons of potato salad.