One thing that has been frustrating for sales managers over time is reporting on actual sales margins from the sales orders themselves.
I propose that in Jiwa V7 whenever a cost is changed to an item that was sold on a particular order (ie due to landed costing, creditors invoice completed after goods sold etc) that a new field that tracks the update to the cost be written after the fact. Ie - there could be a field that tracks the cost known at the time of the order, and another field that could be updated as costs are updated.
This would allow actual margin reporting to be accurate, and the differences between actual reported to GL (before COGS variance) and after the various variances would be more visible down to sales order and sales order line level.