Misc Trade functions List of miscellaneous functions added to Trade area (Sales and Purchases). W1TR004A Unavailability reason codes (track missing quantities with a reason code) W1TR005A Do not recalculate unit price/cost for shipment/receipt (while changing the invoiced quantity) W1TR007A Do not ship/receive zero quantity W1TR009A Allow negative discount W1TR010A Vendor Item No. in prices W1TR012A "Line description" in Posting Group W1TR013A Location code in Copy Document Payment balance per customer/vendor o category Function W1TR006A allows to set balancing account in payment methods for specific customers, vendors or group within "Payment Setup" page. Allowed dates for sales & purchases The functions W1TR008A allows to specify allowed dates for sales or purchases.