Hello @Katerina Winklerova-Oracle Thanks for your kindly reply, Is there any standard method for Rounding optiong that are linked to the Set Up NOT Taxes but TOTAL PRICING of billing?

Hi Niks Blando-Oracle If I created a new price level [55%Discount],then checked UPDATE EXISTING PRICES to save, and then if only this price level applied in one or some items.(no transaction, not for any customer, and no any Quantity Pricing Schedules) then I could not to delete this price level.

Hi Niks Blando-Oracle Thanks for your kindly reply and sorry for late. I checked the 3 coments which you metioned, There are no items that use that price level in a transaction ←　YES There are no Quantity Pricing Schedules that use the price level.3 ←　YES,I did not creat any Quantity Pricing Schedules On your Customer…