diff --git a/app/helpers/ReadingsMailer.rb b/app/helpers/ReadingsMailer.rb
index fbdef4c..5a4fa73 100644
--- a/app/helpers/ReadingsMailer.rb
+++ b/app/helpers/ReadingsMailer.rb
@@ -25,6 +25,9 @@ class ReadingsMailer
     
     # Fetch today's usage
     usage_today = Reading.diff_on(Date.today)
+    c = Cost.new
+    oxxio_cost = c.oxxio_energy_cost(Date.today.to_s,usage_today[:total_kwh_consumed_high]-usage_today[:total_kwh_produced_high], usage_today[:total_kwh_consumed_low]-usage_today[:total_kwh_produced_low])
+    easy_cost = c.easy_energy_cost_barplot(Date.today) # side effect: generates a PNG
     
     mail = Mail.new do
         delivery_method :smtp, smtp_opts
@@ -37,7 +40,9 @@ class ReadingsMailer
                 -------------------------------\n\n
                 Total kWH electricity consumed: #{usage_today[:total_kwh_consumed_high] + usage_today[:total_kwh_consumed_low]}\n
                 Total kWH electricity produced:  #{usage_today[:total_kwh_produced_high] + usage_today[:total_kwh_produced_low]}\n
-                Total m3 gas consumed: #{usage_today[:total_m3_gas_consumed]}\n
+                Total m3 gas consumed: #{usage_today[:total_m3_gas_consumed]}\n\n
+                kWH cost (Oxxio): EUR #{ oxxio_cost }\n
+                kWH cost (EasyEnergy): EUR #{ easy_cost }\n
                "
         end
       
@@ -46,7 +51,10 @@ class ReadingsMailer
           body "<h1>Summary for #{Date.today}</h1>" +
                "<p>Total kWH electricity consumed: #{usage_today[:total_kwh_consumed_high] + usage_today[:total_kwh_consumed_low]}</p>" +
                "<p>Total kWH electricity produced:  #{usage_today[:total_kwh_produced_high] + usage_today[:total_kwh_produced_low]}</p>" +
-               "<p>Total m3 gas consumed: #{usage_today[:total_m3_gas_consumed]}</p>"
+               "<p>Total m3 gas consumed: #{usage_today[:total_m3_gas_consumed]}</p>" +
+               "</br>" +
+               "<p>kWH cost (Oxxio): EUR #{ oxxio_cost} </p>" +
+               "<p>kWH cost (EasyEnergy): EUR #{ easy_cost} </p>"
         end  
       end
       
diff --git a/app/models/cost.rb b/app/models/cost.rb
index 25f5eef..44c1967 100644
--- a/app/models/cost.rb
+++ b/app/models/cost.rb
@@ -118,8 +118,10 @@ class Cost
     title = "Verbruikskosten (incl. belastingen en BTW) - %s" % date.strftime("%A, %e %B %Y")
     xlabel = "uur"
     ylabel = "EUR"
-    GR.savefig("easy_cost_%s.png" % date.strftime("%F"), title: title, xlabel: xlabel, ylabel: ylabel)
+    GR.savefig("plots/easy_cost_%s.png" % date.strftime("%F"), title: title, xlabel: xlabel, ylabel: ylabel)
 
+    # return the sum cost
+    costs.sum
   end