How many Grand Slam titles did the winner of the 1980 Avon Championships of Houston win ? 
1980 Avon Championships of Houston:  Third-seeded Billie Jean King won the singles title and earned $30,000 first-prize money. Billie Jean King:  King won 39 Grand Slam titles: 12 in singles, 16 in women's doubles, and 11 in mixed doubles.
i don't know