user: Question: What is the total of the roll with a Decile of 8, and an Area of Hororata?
Columns: ['Name', 'Years', 'Gender', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Broadfield School', '1–8', 'Coed', 'Selwyn', 'State', 10.0, 115.0]
SQL:

assistant: SELECT SUM("Roll") FROM "Table" WHERE "Decile" = 8.0 AND "Area" = 'Hororata';