Collectible Card Game Headquarters

I'm upgrading the Inventory Stats dialog. Here's a preview:

The header looks a bit odd, but it's framework limitations. I will add columns for oversized and inserts. The question is:
Do we need four columns (Qty, Unique, Total, Missing)? Why don't save some space? I have an idea to make only two columns for each category: Qty and Unique/Total combined, i.e. "343|340/350". What do you think?

I rarely use the sats window, but each combined colum is one less possibility for sorting...

EDIT: answering here as to not distract from Goblin Hero's question and deter others from answering.

Goblin Hero wrote:Yes, but you really need that sorting?

I wouldn't call it "need" ... It's more of a potential "hmm, while I'm looking at stats, I wonder which set has the most/least xy" fleeting moment... which those who like stats are usually prone to have

LordHelmchen wrote:each combined colum is one less possibility for sorting...

Yes, but you really need that sorting?