namespace BrokerageLib { public class Constants { public class CommissionRate { public const decimal Standard = 0.08m; public const decimal Earner = 0.11m; public const decimal Top = 0.14m; } public class Discount { public const decimal PreferredCustomer = 0.2m; public const decimal BulkOrder = 0.5m; } public class CommissionThreshold { public const decimal SalesAmount = 12000m; public const decimal UnitAmount = 400m; } } }