Index: /lib/wpsg_calculation.class.php
===================================================================
--- /lib/wpsg_calculation.class.php	(revision 8377)
+++ /lib/wpsg_calculation.class.php	(revision 8378)
@@ -1591,4 +1591,5 @@
 						
 						if ($this->tax_mode === self::TAXMODE_SMALLBUSINESS) $brutto = $netto;
+						else if ($this->tax_mode === self::TAXMODE_B2B) $brutto = $netto;
 						
 						$ret_netto += $netto;