Reading this made me curious. So I made a google sheet you can use. I think I did everything correctly. Read the instructions on the first sheet before doing anything.
I didn't know the correct decision to make on including PRINT CANCELED entries in the math. The log logs the area and ink it would've taken to do the whole job and not the portion of it that was successful before the cancellation. So I omitted them. I can work on a fix for that in the future but I'm out of time for this today.
Versa Works Log Share
If you want to isolate a specific time period you can only select that week when saving the log in VWorks, but if you do save the entire thing you can simply import the entire log then select the rows you don't want by clicking the row number on the left (will select the entire row) and then using the delete key on the keyboard to erase the cell contents. You can erase multiple rows at once by selecting the first one holding shift and selecting a second one. This will select all rows between the two.
If you want to use this to import multiple log files then you will have to import the files into their own sheets and copy/paste all rows except the header into the main Log sheet one after the other. A little bit more complicated but not that hard to do.
Let me know if I've missed anything, made any other mistakes, or you want clarification or additional functionality.