Why can’t you just explain it here , I charge enough to cover my cost , but I go to them and pk up . Unless you add to each ticket after the fact you to are paying any up charges after the fact . If you put a percentage on your cost at the beginning of the year to cover your shipping and then half way thru the year shipping goes up in cost , it still cost you , no matter how you break it down, you lose that money. If you add 5% to your ticket for shipping at the beginning of the year and shipping is really only 3% well your profiting 2% of that fee , now 6 months into the year the company started charging more and your shipping is now maxed out at that 5% that you did allow, you just lost 2% profit , no matter how you cut it . I’m not saying it hurt you , as you allowed for it but it still took mono from you that you did have as a cushion. The following year you allow 6% and shipping stays at that 6% then you fine you neither made or lost .