Manage costs rounding

I'm having an issue where managed cost on released product form is being rounded from 4 to 2 decimals when activating a new cost. Steps: released product form >Manage costs tab >Item price >Pending prices tab >New >Calculation >select cost version >OK >Activate. The new cost shows price with 4 decimals while released product manage cost fast tab show price with 2 decimals. How can it be changed to contain 4 decimals?

Thanks