Yep 10# can says 24 servings on it but, it always seems to be more than what is suggested as a serving size. I say 7-8 cans should do it, for your peace of mind for $12 bucks!
Peace and Smoke,
My Weapons: Custom rig - Kandi, UDS; Bubba Keg; 22.5 WSM x 2; 18.5 WSM; BWS extended party; BWS Gator and an Onyx Oven; 29' ft Coachmen Leprechaun (Lola).
Dan Chambers get well soon, so we can tell you to "Shut up Chambers"