How to do border-right correctly?

Question

HTML

Hello!
Help with border-right. Here is the link .
It is necessary to make a divka to the full height, something does not work out.
And a little more advice on sass, if possible.
Thank you!

Answer 1

https://jsfiddle.net/hrtdaqqo/5/
For starters, the classic - Don't Repeat Yourself , DRY - one of the basic principles of programming.
This is me about these very blocks with a border ..