We want to be long-term business partner with Rubystar for win-win cooperation. When Mr. Fong adjusted SQI Vietnam prices for all items to increase 10% for 2016 orders, he used average increase for all items, not increase items one by one with different %. As Mr. Fong informed to your boss that some items we loss a lot of money, some items very little profit, when all items increase 10% of course some items still not have profit, but on average, both companies can make money for win-win cooperation. Unfortunately DOP50 is one of the items that we are still not making profit from your order, actually SQI Vietnam price for this item should be higher than 7,150 VND, but we are not increasing the price because you make the decision to buy from us FOB BKK. FOB BKK price for this item is correct at $0.31/pc, thanks.