title: Shopify - Changing checkout totals
body: <p>Anyone know if it's possible to change the total checkout value that is posted to Shopify while on the 'cart' screen?</p>
  
  <p>I want to give certain customer types a wholesale discount (I'm using tags to differentiate the customer types). I'm using the shopify calculation to alter what the user will see but when sending to Shopify the totals are not discounted they are still the actual product price. </p>
  
  <p>I can't seem to figure out where the totals are being stored so I can intercept them. Any ideas?</p>