3 files changed, 3 insertions, 3 deletions
diff --git a/lib/reports/sales_by_country.rb b/lib/reports/sales_by_country.rb
index 58f1b15..4017dbf 100644
--- a/lib/reports/sales_by_country.rb
+++ b/lib/reports/sales_by_country.rb
@@ -1,7 +1,7 @@
 module SalesReporter
   module Reports
     class SalesByCountry
-      def self.render(sales)
+      def render(sales)
         sales_by_country = {}
 
         sales.each do |s|
diff --git a/lib/reports/sales_by_date.rb b/lib/reports/sales_by_date.rb
index 9e623f1..4bc9094 100644
--- a/lib/reports/sales_by_date.rb
+++ b/lib/reports/sales_by_date.rb
@@ -1,7 +1,7 @@
 module SalesReporter
   module Reports
     class SalesByDate
-      def self.render(sales)
+      def render(sales)
         sales_by_date = {}
 
         sales.each do |s|
diff --git a/lib/reports/sales_by_shop.rb b/lib/reports/sales_by_shop.rb
index 7308b1d..66caf63 100644
--- a/lib/reports/sales_by_shop.rb
+++ b/lib/reports/sales_by_shop.rb
@@ -1,7 +1,7 @@
 module SalesReporter
   module Reports
     class SalesByShop
-      def self.render(sales)
+      def render(sales)
         sales_by_shop = {}
 
         sales.each do |s|