user: Question: What is the total number of Rating(s), when Weekly Rank is 76/88?
Columns: ['Episode', 'Air Date', 'Timeslot', 'Rating', 'Share', '18-49', 'Viewers', 'Weekly Rank']
Types: ['text', 'text', 'text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['"Goodbye City...Hello Country"', 'April 30, 2008', '9:00 P.M.', 1.7, 3.0, '1.0/3 (#5)', '2.37 (#5)', '89/96']
SQL:

assistant: SELECT SUM("Rating") FROM "Table" WHERE "Weekly Rank" = '76/88';