Need Know or confirm if the porcentant calculte in trade operation in Landed cost can be rounded

Summary:

When we using trade operation in landed cost in our charge line Allocation Basis  we using “Item Value” so in Material Purchase order in allocations, the percentage is calculeted using ítem value but the this value is don’t rounded and this generete variance, even the total of this porcentaje is don’t equal to 100%, this variance affect to calculate to material accounting and cost ítem.

This is a request of our customer, they have variance in accounting, they purchase millons on material and this represent a loss

So need know if we can setup this calculate to can rounded this Percentage to 2 decimals and with this we can obtian the 100%