user: Question: What is the sum of Game, when High Points is "D. McKey (24)", and when Team is "@ Dallas Mavericks"?
Columns: ['Game', 'Date', 'Team', 'Score', 'High points', 'High rebounds', 'High assists', 'Location Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [28.0, 'January 3', 'Philadelphia 76ers', 'W 127-99', 'D. McKey (24)', 'M. Cage (12)', 'G. Payton (11)', 'Seattle Center Coliseum 13,048', '13-15']
SQL:

assistant: SELECT SUM("Game") FROM "Table" WHERE "High points" = 'D. McKey (24)' AND "Team" = '@ Dallas Mavericks';