Inspired by an article on football 365 and with some time to kill this morning

Our biggest signing in each position (4-4-2):

McCarthy (4.4)

Hunt (2)
Sakho (25.4)
Tomkins (10.5)
Van Aanholt (9.5)

Townsend (14)
Luka (14)
Cabaye (12.5)
Schlupp (12.4)

Benteke (28.1)
Wickham (9)

Total: 141.8 milion

Our biggest sales in each position:

McCarthy (4.2)

Clyne (2.9)
Hall (4)
Coleman (4.4)
Gordon (1.2)

Zaha (10.6)
Hopkin (4.4)
Jedinak (4)
Bolasie (26)

Gayle (10.
Johnson (9.9)

Total 56.4 million

Source: [Link]

Random thoughts: To be fair most of our top 10 sales are strikers (Morrison, Armstrong, Janson, Murray)
Chris Coleman was sold in 1995/6...
I was fairly strict with positions - I seem to remember Hopkin playing central?
Kenny Sansom is our third most expensive left back sale ever!