Complex sentence: The operation was small compared to the larger, more organized bookmakers, which would employ an average of fifty controllers running bets, On a good week, Krugman and Menna might turn a $12,000 profit.
Split into simpler sentences: The operation was small compared to the larger, more organized bookmakers, which would employ an average of fifty controllers running bets. In a good week, Krugman and Menna might turn a $12,000 profit.