diff --git a/main.py b/main.py
index fc0d02140071c5b0f6ec5f06cf80f069e7f48f88..d39a2a18817f57cc258e321fd02295b341531498 100644
--- a/main.py
+++ b/main.py
@@ -1,11 +1,15 @@
 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
 
 class OrderApp(App):
+    total = NumericProperty(0) # in cents
     def build(self):
         inspector.create_inspector(Window, self)  # For inspection (press control-e to toggle).
+    def amount_changed(self):
+        self.total= round(self.root.ids.food.value*100)
+
 
 
 if __name__ == '__main__':
diff --git a/order.kv b/order.kv
index 46bf819e282417a438f34929e018bf7d51b15c9a..e57aee9503a2f267670b96c32e47018e9ddc0938 100644
--- a/order.kv
+++ b/order.kv
@@ -17,7 +17,12 @@ 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)