Table schema:
CREATE TABLE table_2544694_3 (indonesia_super_series_2008 VARCHAR, runner_up VARCHAR)

Question: Which series occurred in which the semi-finalist was runner-up and the 7800.00 was 6420.00?
SQL: SELECT indonesia_super_series_2008 FROM table_2544694_3 WHERE runner_up = "Semi-Finalist" AND 780000 = "6420.00"