title: Checkbox to change state of label, tkinter
body: <p>I've recently started using tkinter, trying to create a very basic GUI for a til system. The idea is to have 8 checkboxes, that represent 8 different items, and when the checkbox is ticked or unticked, the label that shows the total price of the order changes accordingly.</p>
  
  <p>The code here shows what I currently have relating to the checkboxes and the price. I want the LabelP ( price label ) to show the price of what has been selected on the menu at any given time. My current attempt at it doesn't seem to work. I'm relatively new to tkinter in general, so any help would be appreciated. </p>