The idea is to allow you to modify the calculation management by first determining the net unit price and only then multiplying by the quantity. In this way, 16 rows of 1 piece would have the same value (added) as a row of 16 pieces (due to rounding).
NOW
price 221.85 , discount 49% , qty 16 the system calculate
221,85*49/100 = 108.7065
(221,85-108.7065) * 16 = 1810.2960 rounded 1810.30
DESIRED
221,85*49/100 = 108.7065 rounded 108.71
(221,85-108.71) * 16 = 1,810.24
Comments
And I also want to mention again that many customers would like to indicate the discount percentage on there business papers (like e.g. the invoice), but this information is not on the sales line if we use retail pricing or UPM. We have made customizations and created a new field where we calculate the percentage back from the total discount, but if I remember properly we also had some rounding issues because of the current way how MSFT is calculating the discount value. Hence I voted for this idea to perhaps have another choice of the calculation method. BTW: The current discount calculation is like this:221.85*16*0.49=1739.304 which is rounded to 1739.30Hence the net amount will be 221.85*16-1739.30=1810.3