Since you have a few goals that you are trying to accomplish here, you are going to need modules for each one of the goals. In order to create an ASCII table, I would look into using the Perl module Perl6::Form. As far as taking the epoch times and manipulating them and organizing them, you can check out some of the following modules: Date::Manip, Time::Format, Time::Period. Using these modules will allow you to compare times and create functions to compare the jobs and put them where they need to go.

What I would do is to write a function to determine what time the job is running and push it into a complex data structrue. Then iterate over that data structure to create the table you are looking for. You may want to check out planetscape's Re: How can I visualize my complex data structure?.

However, if you looking for more specific help...the best way to get it is to actually start the work. Attempt some code (ie a specific part of your program). If you are having trouble, show us what you have tried and the errors it gives you and we will do our best to help you along and explain why what happened happened. But just asking for general help with a problem may not quite yield the results you are looking for.