fix - change base of pre sale / extra sale on quota stat & total purchase of rancher in Quota usage calculation

apps/product/models.py

@@ -863,6 +863,8 @@ class OrganizationQuotaStats(BaseModel):
         ('distribution', 'DISTRIBUTION'),
         ('quota', 'QUOTA'),
     ), default='distribution')
+    free_sale_balance = models.PositiveBigIntegerField(default=0)
+    pre_sale_balance = models.PositiveBigIntegerField(default=0)
 
     def update_amount(self, main_quota=None):
         """ calculate total/sold/remaining """