Typcially if you do the three man system...here is how it breaks down for adult league games....

Lines: $24 or so X's 2
Center $45 or so


In high school, we usually got about $70 for a JV and a varsity game, that was 2 referees, so that is $140 for two games....You are going to pay a little more each time if you have 3 referees. Most likely, you won't have people running the lines for less than $25, so you would end up with about a $200 bill for 2 games, maybe a little less. But you figure even $40 more each game is going to cost you 8 home games or $320 for the year, not including tournaments. Not much, but more money for cash strapped school districts.