I agree with the above. That said, I have been able to get the DOL to accept a combination of their calculator and a spreadsheet. It has probably been 5 years since I did it that way so I'm not sure if they would still accept it, but it may be worth a try.
For example, lets say you have 100 participants who deferred and you have one late payroll. Rather than doing 100 individual calculations,you do one earnings calculation on the entire amount and use a spreadsheet to distribute the lost earnings based on each participants "share" of the late deposit. The result can be a little different from one by one calculations due to rounding, but it is minimal and to be on the safe side you can always round up so that a participant will get a fraction of a cent more rather than less.