user: Question: How many total finals where there when the last win was in 2012-13?
Columns: ['School', 'Winners', 'Finalists', 'Total Finals', 'Year of last win']
Types: ['text', 'real', 'real', 'real', 'text']
Sample row: ['Royal Belfast Academical Institution', 7.0, 5.0, 12.0, '2003-04']
SQL:

assistant: SELECT SUM("Total Finals") FROM "Table" WHERE "Year of last win" = '2012-13';