refact.

Yavsc.Server/Models/Billing/FixedImpacter.cs

@@ -0,0 +1,16 @@
+using Yavsc.Billing;
+
+namespace Yavsc.Models.Billing   {
+public class FixedImpacter : IBillingImpacter
+{
+    public decimal ImpactedValue { get; set; }
+    public FixedImpacter (decimal impact)
+    {
+        ImpactedValue = impact;
+    }
+    public decimal Impact(decimal orgValue)
+    {
+        return orgValue + ImpactedValue;
+    }
+}
+}