*connected the slider with the price

*display the amount of meals
*use can choose his type of food
*added image

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
+from kivy.uix.textinput import TextInput
 class OrderApp(App):
+    no_of_meals = NumericProperty(0)
+    total=NumericProperty(0)
+    amount=NumericProperty(0)
     def build(self):
         inspector.create_inspector(Window, self)  # For inspection (press control-e to toggle).
 
+    def Amount_of_food(self):
+        try:
+            self.no_of_meals = int(self.root.ids.number_of_meals.text)
+        except ValueError:
+            self.no_of_meals = 0
+
+
+    def amount_changed(self):
+        self.total=round(self.root.ids.food.value * 100)
 
 if __name__ == '__main__':
     app = OrderApp()

order.kv

@@ -17,7 +17,36 @@ BoxLayout:
             size: self.texture_size
             padding: (sp(12), 0)
         Slider:
+            id: food
             range: (0, 100)
+            on_value: app.amount_changed()
     Label:
-        text: f'Your total is $0.00'
+        text: f'Your total is $ {app.total /100:.2f}'
         font_size: sp(24)
+
+    ToggleButton:
+        text: 'vegan'
+        group: 'food_type'
+    ToggleButton:
+        text: 'meat eater'
+        group: 'food_type'
+        state: 'down'
+
+    Image:
+        source: 'index.jpeg'
+        size_hint: (1, 1)
+    BoxLayout:
+        orientation: 'horizontal'
+        Label:
+            #on_textinput: app.Amount_of_food()
+            text: f'How many meals?  '
+
+        TextInput:
+            id: number_of_meals
+            input_filter: 'int'
+        Button:
+            text:'ok'
+            on_press:app.Amount_of_food()
+        Label:
+            text: f'Your number of meals= {app.no_of_meals:}'
+            font_size: sp(12)