Quote from Kelso in The Keg
Donna: Go for it, Eric. Eric: Yeah, we'll throw a party. Gonna charge $2 a head. Kelso: $2 a head. A keg is equivalent to seven cases, that's 168 beers. If we each drink three beers a piece- Hyde: No way, sophomores gonna drink one. Kelso: True. Hyde: Yeah, and the freshmen will only drink a half. Kelso: So that averages out to 1.5 beers per person which means we can invite 112 people. That's $224. Hyde: Cash. Kelso: Which is decent.