Ask yourself (in the context of the meal overall) how may potatoes could YOU eat. Once you have that in your head you can multiply the number by the number of guests you are intending to feed.
it takes approximately 20 cases of beef patties.
it depends on their apetite.
Twenty pounds
That depends on the recipe you use.
75 pounds of food a day
165.35 pounds
75 pounds = 34.0194277 kilograms.
75 pounds is 5.35 stone
75 g = 0.1653 lbs.
There are approximately 0.165 pounds in 75 grams.
0.46875 pounds.