Little Help... Using Open Office for 531

Since I do not have MS Excel I am using Open Office to create a template for JW’s 531.
I am having some trouble though as the functions are not identical to that in Excel.
If anyone has wherewithal in Open Office please shoot some directions for 531.

I’d download any one of the million that are out. They’ll all work with Open Office. Then you don’t need to make a new one.