I sale pet products in my store and I have issues setting up prices and still be profitable and fair. I am using Tiered % Markup on wholesale cost. Still I feel that is not the right mapping and it seems that some products either are too expensive or too close to break even. I use inventory source for inventory management.
my Suppliers use fed ex but shopify at least for me offers me only UPS and USPS and sometimes the rates are different and sometimes I lose money on shipping. So in order to brak even with shipping I have to charge 40% on handling.