user: Question: how much money was requested on the show which aired on 4 September 2011?
Columns: ['Episode', 'First aired', 'Entrepreneur(s)', 'Company or product name', 'Money requested (£)', 'Investing Dragon(s)']
Types: ['text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Episode 1', '31 July 2011', 'Georgette Hewitt', 'The Present Club', 60000.0, 'Peter Jones and Theo Paphitis']
SQL:

assistant: SELECT SUM("Money requested (£)") FROM "Table" WHERE "First aired" = '4 September 2011';