I've got an event coming up and I want to be ready to serve 300 people pulled pork sandwiches with a side of beans and slaw. I figure 1/4 lb each for pork, beans, and slaw. How many heads of cabbage would it take to make 75lbs of slaw? One esitmate I came up with was 30 heads green cabbage and 8 heads red cabbage. Does that sound right? Seems like it'll be way too much. If it's right, I need to get an order in now. Event is in 2 weeks.