Analyzing whether a project was on time or late

I need a spreadsheet that will look at specific columns and determine based on the calendar dates entered in those columns whether a project was a) submitted On Time or Late, and b) the # of Days Early/Late it was submitted. Please see the attached spreadsheet as an example. I have highlighted in green what I'd like the spreadsheet to automatically populate.

Thanks!! I really love this forum.

I believe I answered my own question. Here is the formula I used to populate whether a task was On Time or Late with L4 being the column showing the Due Date and M4 being the Submitted Date.
=IF(L4>=M4,"On Time","Late")

Here is the column for the # of days Early and Late.
=IF(COUNT(L4,M4)=2,TEXT(M4-L4,"0 ""Day(s) Late"";0 "" Day(s) Early"";""0 Day(s) Early"""),"")

Hope this info helps someone else out.