we want to custom that markup % by each product and can somehow update it all at the same in case our cost has some adjustments, please review my example here: I buy from Lutron and have their dealer price list, I mainly sell about 200 products of them. Our sell price will be various from 130%-150% MSRP depend on the item (import tax, shipping, ...) Let's say after 6 months, Lutron update their price list to go up 5% for all items, in that case, if we want to increase our price 5%, we have to go to each item and adjust our sell price manually, 200 of it, one by one.