user: Question: What is the amount of time (sum) at 40° that it takes a 16 lb shell to reach a maximum of no more than 22000 ft?
Columns: ['m/v ft/s', 'Shell (lb)', 'Time to ft (m) at 25° (seconds)', 'Time to ft (m) at 40° (seconds)', 'Time to ft (m) at 55° (seconds)', 'Max. height (ft)']
Types: ['real', 'real', 'text', 'real', 'real', 'real']
Sample row: [1990.0, 12.5, '10.1', 15.5, 22.1, 19000.0]
SQL:

assistant: SELECT SUM("Time to ft (m) at 40° (seconds)") FROM "Table" WHERE "Shell (lb)" = 16.0 AND "Max. height (ft)" < 22000.0;