https://docs.google.com/spreadsheets/d/1GzurYi10hGPWu_8nmaHOkO0ujgxs4kMLD-j0v5DhmjE/edit#gid=63721883
Profit is noticibly lower per order on critical orders, as well as orders not specified. For maximum profitablity it recommended to encourage customers to use low through high, and make sure that they are recording the priority of the order.
Book cases and tables are losing money per order. It is suggested to re-evaluate shipping methods, and other areas where costs of each order can be reduced to adjust for this.