Question regarding leveled item list w/ PICTURE

[AncientSion]

So i want to alter the amounts of stimpaks that are sold via vendors.

 

I found this ilvl list and opened it up.

 

http://prntscr.com/ym0r1

 

Now, i dont realize how can i alter the stimpak count or rather how actually it effects the vendors.

Can someone please explain the 3 entires to me, especially the "level" column and the "count" column ?

I know the first entry is actually another item list including packs.

What i want to know is what dice are rolled and how the income on average from one item list "vendorstimpak" is calc'ed.

 

 

thanks a lot.