Hello! Can someone help me please with this exercise?

The Kentucky Derby is held the first Saturday in May at Churchill Downs in Louisville, Kentucky. The race track is one and one-quarter miles. The following table shows the winners since 1990, their margin of victory, the winning time, and the payoff on a $2 bet.

Determine the mean for the payoff on a $2 bet. (Round your Mean answers to 4 decimal places )

My answer for the mean of the payoff on a $2 bet is 29.8040, but it's not right!