user: Question: What was the sum of Revenue ($M), when the Debt as % of value was higher than 27, and the Operating income($m) was 77?
Columns: ['Rank', 'Team', 'Country', 'Value ($M)', 'Debt as %of value', '% change on year', 'Revenue ($M)', 'Operating income($m)']
Types: ['real', 'text', 'text', 'real', 'real', 'text', 'real', 'real']
Sample row: [1.0, 'Manchester United', 'England', 1800.0, 60.0, '24', 394.0, 111.0]
SQL:

assistant: SELECT SUM("Revenue ($M)") FROM "Table" WHERE "Debt as %of value" > 27.0 AND "Operating income($m)" = 77.0;