diff --git a/membershipworks/tables.py b/membershipworks/tables.py
index 8011be4..9718922 100644
--- a/membershipworks/tables.py
+++ b/membershipworks/tables.py
@@ -153,7 +153,7 @@ class CurrentAndUpcomingEventTable(EventTable):
         sequence = ("title", "start", "next_meeting")
 
 
-class MoneyFooterColumn(MoneyColumn):
+class MoneyFooterColumn(CurrencySymbolMoneyColumn):
     def render_footer(self, bound_column, table):
         value = getattr(table.event, bound_column.accessor)
         if value is not None:
@@ -182,18 +182,16 @@ class InvoiceTable(tables.Table):
         _math_header("Quantity", "Q"),
         footer=lambda table: table.event.quantity,
     )
-    amount = CurrencySymbolMoneyColumn(_math_header("Amount", "A=P*Q"))
-    materials = CurrencySymbolMoneyColumn(
-        _math_header("CMS Collected Materials Fee", "M=m*Q")
-    )
-    amount_without_materials = CurrencySymbolMoneyColumn(
+    amount = MoneyFooterColumn(_math_header("Amount", "A=P*Q"))
+    materials = MoneyFooterColumn(_math_header("CMS Collected Materials Fee", "M=m*Q"))
+    amount_without_materials = MoneyFooterColumn(
         _math_header("Event Revenue Base", "B=A-M")
     )
-    instructor_revenue = CurrencySymbolMoneyColumn(
+    instructor_revenue = MoneyFooterColumn(
         _math_header("Instructor Percentage Revenue", "R=B*I"),
     )
-    instructor_amount = CurrencySymbolMoneyColumn(
-        _math_header("Amount Due to Instructor", "R+M")
+    instructor_amount = MoneyFooterColumn(
+        _math_header("Amount Due to Instructor", "R+M"),
     )
 
     class Meta: