diff --git a/app/models/dining_charge.rb b/app/models/dining_charge.rb
index 0c52811f..e1d70278 100644
--- a/app/models/dining_charge.rb
+++ b/app/models/dining_charge.rb
@@ -1,4 +1,41 @@
 class DiningCharge < ApplicationRecord
   belongs_to :table
   belongs_to :room
+
+  def amount_calculate(dining_charges_obj, checkin , checkout)
+
+    if !checkin.nil? && !checkout.nil? && !dining_charges_obj.nil?
+
+      minutes = ((checkin - checkout) * 24 * 60).to_i # stay minutes
+      dining_minutes = minutes - dining_charges_obj.minimum_free_time # stayminutes - free minutes
+      charge_type = dining_charges_obj.charge_type
+      if charge_type == 'hr'
+
+      elsif charge_type == 'day'
+        price = charge_by_day
+      end
+    end
+
+  end
+
+  def charge_by_hour
+
+  end
+
+  def charge_by_day(chargesObj, dining_minutes)
+    minues_per_day =  12 * 60
+    result = dining_minutes / minues_per_day
+    if result < 1
+      return chargesObj.unit_price
+    elsif result > 1
+       solid_price = result * chargesObj.unit_price
+
+       remain_value = dining_minutes % minues_per_day
+       roundingblock = remain_value / chargesObj.time_rounding_block
+       if roundingblock > 1
+
+       end
+    end
+  end
+
 end