Pool the tips, enter each person's hours, get an exact split. Add role weights if your pool isn't flat.
Method: each person's share = pool x (their weighted hours / total weighted hours). Weighted hours = hours x role weight (flat pool = every weight at 1). California note: owners, managers and supervisors can't take from the pool (Labor Code 351); tip pooling among the service chain is legal. Not legal advice.
One numbers breakdown, one rule that costs you money, one growth move. Three times a week, anonymous, free.