Hello,
My name is Sergey. I am Freelancer from [login to view URL], Russia.
I can help you as a WordPress/Gravity Forms programmer to add the average score per student based on the 5 subjects and total score. Yes, I can use Gravity View plugin.
I need FTP access to start right now. And login/password into "wp-admin" Dashboard.
I can communicate via Freelancer.com.
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Sergey aka Takereal