Difference in invoice total

Hi,

there is difference  in invoice for few cents in standard invoice R42565.

if see the total as per the below screen shot. total is equals to 6273.82 and tax group  summery  627.38

but when we see the net due date 627.45 and total comes to 6901.27 where it should be 6901.20 so there is difference of .07 cents

kindly suggest