user: Question: What was the sum of the numbers listed under against when Currie Cup "B" Section was the opposing team?
Columns: ['Opposing Team', 'Against', 'Date', 'Venue', 'Status']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Currie Cup "B" Section', 21.0, '19/05/1984', 'Kings Park Stadium , Durban', 'Tour Match']
SQL:

assistant: SELECT SUM("Against") FROM "Table" WHERE "Opposing Team" = 'Currie Cup "B" Section';