Did a rough estimate which brought it out at about £4.5m. Will try to note below:
Coventry - 30,000 tickets sold @ £20pp = £600,000
Middlesbrough - 30,000 tickets sold @ £20pp = £600,000
Sunderland - 40,000 tickets sold @ £20pp = £800,000
Luton - 10,000 tickets sold @ £20pp = £200,000
Total...