Something I found to be really helpful and (DIY calc fix at same time) is to learn what each major component of doc means and the math behind it. This will keep you on your game to notice incorrect numbers quickly. If you need help correcting cells, google it and learn some basics of excel or I can help with simple tasks. I realize that you might want to just plug in the numbers and it works, but until its locked for edit, things are going to get scrambled. It’s good to know, pretty simple for baseline stuff (this) will save you time waiting for someone else to fix and will give you a better understanding of the math we use.