CREATE TABLE table_70498 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What was the aggregate score that had Union Douala as Team 1?
SELECT "Agg." FROM table_70498 WHERE "Team 1" = 'union douala'
SELECT "Agg." FROM "table_70498" WHERE "Team 1" = 'union douala'