In the code where you do plus or minus, you need to add the totalBoysScore = totalBoysScore + 1 or totalBoysScore = totalBoysScore - 1 (same with the girls score) then you use the amounts in these variables to fill the last slide.
In the code where you do plus or minus, you need to add the totalBoysScore = totalBoysScore + 1 or totalBoysScore = totalBoysScore - 1 (same with the girls score) then you use the amounts in these variables to fill the last slide.