title: Shopify API CARTS - Changing line_item line_price for price Override
body: <p>Shopify has a CARTS api but it is read-only. I am trying to find a way to manipulate the line_item's line_price or price attribute. Shopify support has directed me here for an answer.</p>
  
  <p>Since there is no proper documentation on this any help would be appreciated.</p>