The process for calculating the compensation for u23s isn't straight forward hence why Rangers need information from Accrington Stanley.
Unfortunately for them they didn't rear these players, Huddersfield did.
Crooks was only there 17 months and Windass three years.
These training costs are only applicable until the age of 21 or once established as a first team player. (training complete)
http://blog.fieldoo.com/2014/05/the-calculation-of-training-compensation-in-football-part-1/
http://blog.fieldoo.com/2014/06/the-calculation-of-training-compensation-in-football-part-2/