Pricelist rule to get big UoM cheaper than small Uom
I have a product buy by box (defined in Uom), but it can be sold by PC or box. (10PC each box)
I have a pricelist rule to the product type that it belogs, the rule is to add a 35% of the cost, and round the total to 0.25
The example product costs $10,
When I generate the sale order if I sell it by box it has a price of: $13.5 wich is ok, but if I sell it by PC, it has a price of $1.25, it is not ok for me to sell the PC cheaper than the whole box.
I tryed to set min. margin to 0.35, but when I do that, it just doesn't round it, and a PC costs 1.35, instead of 1.5 the PC, and 13.5 the whole box.
How can I ensure that the sale by big UoM is cheaper than the small UoM using pricelists based on cost and article type, rounding to 0.25 and having a 35% margin??
Thanks in advance