user: Question: During the period in which gross sales totals for "The Show Girl Must Go On" reached $2,628,457, what did the numbers show for tickets sold/ available at the box office? 
Columns: ['Dates (MDY)', 'Gross Sales', 'Tickets Sold / Available', 'Shows / Sellout', 'Sellout (%)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['February 20–24, 2008', '$2,502,251', '16,591 / 16,591', '4 / 4', '100%']
SQL:

assistant: SELECT "Tickets Sold / Available" FROM "Table" WHERE "Gross Sales" = '$2,628,457';