Defining Special Prices for Business Partners 
Use the procedures below to define the following types of special prices for business partners:
Date-dependent
Quantity-based
Procedure
Defining Date-Dependent Special Prices for a Business Partner
You can define date-dependent special prices for particular periods. If an item is sold within one of these periods, the date-dependent special price applies, ignoring the price in the price list.
From the SAP Business One Main Menu, choose
Inventory 
Price Lists Special Prices Special Prices for Business Partners
.The Special Prices for Business Partners window appears.
To define the special price of an item for a business partner, in the Special Prices for Business Partners window, enter the required business partner and item information.
In the Source Price column, select one of the price's currencies. The default is Unit Price – Primary Currency.
NoteYou can define special prices only in one currency, based on the selected item's price currency.
You must choose a source price which has a value for the specific item, in the specific price list, to be able to base the special price on that price.
The Source Price column is disabled when you choose any of the following options in the Price List field: Without Price List, Last Purchase Price, or Last Evaluated Price. For those options, only the primary currency price is relevant.
End of the note.To open the Period Discounts window, in the # column, double-click a row. Enter the required dates, price list, discount, and price after discount and choose the Update button.
NoteIf no date-dependent special price has been defined for an item, SAP Business One assumes that the customer-specific special price has been valid since the date on which it was added. The special price with the appropriate valid-from date appears in the first row.
End of the note.To save the modified special prices, in the Special Prices for Business Partners window, choose the Update button.
Defining Quantity-Based Special Prices for a Business Partner
From the SAP Business One Main Menu, choose
Inventory Price Lists Special Prices Special Prices for Business Partners
.The Special Prices for Business Partners window appears.
To open the Period Discounts window, in the # column, double-click a row. Enter the required dates, price list, discount, and price after discount.
In the Period Discounts window, double-click a price-list row to open the Special Prices - Volume Discounts window, and enter the quantity, discount, and special price.
After you enter or change the price, SAP Business One automatically calculates the discount according to the difference between the quantity-based and the date-dependent special price.
NoteIn this window you can set different special prices for each of the defined units of measurement (UoM) of the item.
End of the note.To confirm your entries, choose the Update button in the Special Prices - Volume Discounts window and the Period Discounts window.
To save the modified special prices, choose Update in the Special Prices for Business Partners window.
NoteTo define quantity-based special prices, you do not have to define a date dependency in addition to the SAP Business One default one. You can also define quantity-based special prices directly, based on the special price for the business partner.
End of the note.