Percentage calculation based on multiple date criteria

Hello all,

I run into an issue when calculating percentage for this sheet. I have 70 rows of people, with 25 columns of dates. Each column is a particular training. Each row is a particular person.
Each training has an expiration date. Most yearly, 2 quarterly, and 2 'every 4 years'. I need to calculate the individual percentage of completion based on those dates.
Example:
Person 1 -- has 23 certifications that are up-to-date and in-line with the requirements per column. 1 certification was never completed (cell is blank), and 1 is expired (greater than that column's particular date).
His percentage should be calculated appropriately (92%).

How do I accomplish this?

Thanks!


Edit: Solved in post #8. See this post and last post for explanations and solutions.