thanks for the revised purchase order but the exact price of 160kg is USD75/kg. According your previous, we know that you offer the same price USD65/kg for the 160kg to Anna, we also can support the decision remain the same price USD55/kg of 160kg for you but the returned charge of air shipment we will add the cost into your next shipment. We will inform you the cost after reutrned.Appreciate you can understanding.