Annual , pre month REFUND

FML :)) I really need to change a different plan. I have Annual plan (paid monthly ) Creative Cloud All App + ADOBE Stock Membership.

I require to SWITCH Lightroom CC +1 TB plan (12.09+PVN).

What does it mean i will get back partial refund ammount of eur 6.05 ??!! 

So basically i must be paid montly by ammount STOCK MEMBERSHIP eur 29.99 + (PVN) and LIGHTROOM CC+1TB eur 12.09 +PVN, correct?