Provide a way to enter a line total and have the quantity sold automatically calculated.

application/migrations/sqlscripts/3.2.0_to_3.3.0.sql

@@ -0,0 +1,4 @@
+-- Add new config option to allow derive sale quantity feature
+
+INSERT INTO `ospos_app_config` (`key`, `value`) VALUES
+('derive_sale_quantity', '0');