Program completed

main.py

 from kivy.app import App
 from kivy.modules import inspector # For inspection.
 from kivy.core.window import Window # For inspection.
-
+from kivy.properties import NumericProperty
 __app_package__ = 'edu.unl.cse.soft161.order'
 __app__ = 'Order Meal'
 __version__ = '0.1'
@@ -12,6 +12,27 @@ class OrderApp(App):
     def build(self):
         inspector.create_inspector(Window, self) # For inspection (press control-e to toggle).
 
+    money = NumericProperty(10)
+    total_price = NumericProperty(0)
+    chicken_price = 4
+    ham_price= 4
+
+    def chicken_buy(self):
+        self.total_price+=4
+
+    def beef_buy(self):
+        self.total_price+=4
+
+    def ham_buy(self):
+        self.total_price+=4
+
+    def checkout(self):
+        self.money=self.money-self.total_price
+        self.total_price=0
+
+
+
+
 
 if __name__ == '__main__':
     app = OrderApp()

order.kv

 BoxLayout:
     orientation: 'vertical'
     Label:
-        text: '[Your meal-ordering GUI here]'
+        text: 'UNL Sandwich Shop'
+    BoxLayout:
+        Label:
+
+            size_hint: (1, 0.25)
+            text: 'Chicken'
+        Button:
+            id: chicken_purchase_button
+            size_hint: (1, 0.25)
+            text: 'Purchase'
+            on_press: app.chicken_buy()
+
+    BoxLayout:
+        Label:
+
+            size_hint: (1, 0.25)
+            text: 'Beef'
+        Button:
+            id: beef_purchase_button
+            size_hint: (1, 0.25)
+            text: 'Purchase'
+            on_press: app.beef_buy()
+
+    BoxLayout:
+        Label:
+
+            size_hint: (1, 0.25)
+            text: 'Ham'
+        Button:
+            id: ham_purchase_button
+            size_hint: (1, 0.25)
+            text: 'Purchase'
+            on_press: app.ham_buy()
+
+    BoxLayout:
+        Label:
+            font_size:'24sp'
+            text: 'Money'
+
+        Label:
+            text: '$'+str(app.money)
+
+    BoxLayout:
+        Label:
+            font_size:'24sp'
+            text: 'Total Price'
+
+        Label:
+            text: '$'+str(app.total_price)
+
+    BoxLayout:
+        Button:
+            text: 'Checkout'
+            on_press: app.checkout()