CREATE TABLE table_71279 ("Rank" FLOAT, "Team" TEXT, "Country" TEXT, "Value  ( $M ) " FLOAT, "Debt as %of value" FLOAT, "% change on year" TEXT, "Revenue  ( $M ) " FLOAT, "Operating income ( $m ) " FLOAT)

What was the sum of Revenue ($M), when the Debt as % of value was higher than 27, and the Operating income($m) was 77?
SELECT SUM("Revenue ($M)") FROM table_71279 WHERE "Debt as %of value" > '27' AND "Operating income($m)" = '77'
SELECT SUM("Revenue ($M)") FROM "table_71279" WHERE "Debt as %of value" > '27' AND "Operating income($m)" = '77'