What's the difference between BASIC, PROFESSIONAL, INTERNATIONAL and SCOUT?

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SoccerAssociation BASIC (5.99 GBP per quarter)
SoccerAssociation PROFESSIONAL (23.99 GBP per quarter)
SoccerAssociation INTERNATIONAL (38.99 GBP per quarter)
SoccerAssociation SCOUT (199.99 GBP per quarter)
Number of users:
Cost per quarter: GBP
NB: 1 quarter = 3 months,
20+ users = 20% discount, 15-19 = 15%, 10-14 = 10%, 5-9 = 5%
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