|Date|Position|Name|From|Fee|
|---|---|---|---|---|
|5 July 2001|MF|Andy Hughes|Notts County|£250,000 by a tribunal|
|5 July 2001|DF|Adrian Whitbread|Portsmouth|Free|
|18 July 2001|DF|Alex Smith|Port Vale|Free|
|30 November 2001|GK|Antony Malessa|Oxford United|Free|
|28 January 2002|MF|John Salako|Charlton Athletic|£50,000|
|13 March 2002|GK|Frank Talia|Sheffield United|Free|
|15 March 2002|MF|Kevin Watson|Charlton Athletic|£150,000|

Question: what is the total number of free fees?
Answer: 4