Inputting a list - plea for ideas!

Hi all,

I'm afraid I thought it would take me far too long to explain in text what I'm trying to do, so have recorded a snip, instead. If anyone has a minute or two to look at it and can think of any genius ideas on how I can do this, let me know!

Thanks :)

https://mix.office.com/watch/1o8gxdj29o9k7?autoplay=1