Not really an important thing at all, but I had 333,337 units a while back and I wanted to see if I could either spend 4 or gain 1 and spend 5. I wasn’t able to find a way, but maybe someone on the forums knows 
Speaking of which, someone suggested being able to buy single unit coins for 1 unit as decorations, so if there isn’t actually a way, let’s hope PTG accepts that suggestion 
You can sell hula dolls since they go for 5 units each. That fixed it for a few people
how does that help him…?
it fixed it for me when I had one extra unit
Is it just a glitch or something where it rounds you to the nearest 5 or something? Thats actually pretty interesting although not really the kind of solution I was expecting
either that or you could ask zak 
Honestly its moreso that I was curious than actually wanting to micromanage my unit count, but thanks for the suggestion
Just another reason we need the button back.