Everyone in my group had the gouge for how to make a spread sheet so there’s no calculator needed when you go in. They’re not looking for perfection, instead to see you have the majority of what you say. I know people who had 60+ hr discrepancies and they got hired. Depending on who does your review if you have the spreadsheet they won’t even open your logbook. Others may just look to see if what you have on your sheet is in your book. A good prep company will give you that gouge.