To calculate the Prime Rib Needed (PR):
\[ PR = G \times A \]
Where:
Prime rib per person is the estimated amount of prime rib meat that should be prepared for each guest at an event. This estimation helps in planning and ensuring that there is a sufficient amount of food for everyone without excessive leftovers. The appetite level is typically 0.5 pounds for light eaters, 0.75 pounds for average eaters, and 1 pound for heavy eaters.
Let's assume the following values:
Using the formula:
\[ PR = 20 \times 0.75 = 15 \text{ lbs} \]
The Prime Rib Needed is 15 lbs.