A brother and sister team, Anthony and Rosa, took over the family's Italian restaurant business from their father. Rosa operates one of the three locations, keeps the firm's books, and orders supplies and equipment for all three locations. Anthony operates the other two restaurants. Anthony thinks he should get two$-$thirds of the company profits because he is responsible for the profitability of two out of three locations. Rosa sees it differently because she feels her responsibilities span the entire business. What's most important for them to remember in their situation is