The answer to your question is that when the Running total is greater than the Volume total (60), instead of entering in the running total amount, you calculate the total volume minus the previous running total and then put the value in that cell. i.e 60 - 59.98 = .02

That is how I got the .02. Also, if there is a record below that one, you would stop calculating running total and ToFrom and put Null values as a value for those 2 columns. for the rest of the records in that groupid. (see my example I posted with better explanation).