A core feature of frontflip is the ability to track identical items at different prices. Shopify variants do not support different price levels, which means frontflip only publishes one price level at a time.
For example: Two identical T-shirts listed at $350 and $450 can't be available at the same time using one variant. frontflip allows you to control the order your items sell via Inventory Priority.
Inventory priority will only impact identical items and determines the order of availability in your Online Store & POS.