Variants roll up to the parent, because decisions do too
Every variant under a listing — size, colour, pack count — is also totalled at parent level. If the decision is made at listing level, the number should be read at that level: ad budget, price and stock decisions usually apply to the parent, not to one child.
The variant view can mislead on its own
A single size selling badly can make a whole listing look weak, while the listing as a unit is healthy. The opposite happens too: one strong variant can cover for four weak ones and the parent still looks fine.
Neither view is the right one on its own. The parent view answers "should I keep advertising this listing"; the child view answers "which size should I stop restocking".
Both levels are read together
Switching between the two is a tab, not a different report: the period, marketplace and currency you picked stay where they are.
Variant counts are shown next to the parent row, so you can see how many children the total is made of before you read it.
Frequently asked questions
Can I see profit at parent ASIN level?
Yes. Variants are rolled up to the parent and shown with variant count, units, sales, net profit and margin. The child-level view stays available as a separate tab.
Is ad spend rolled up too?
Yes. Spend attributed to the children is included in the parent total, so listing-level ACoS is readable without exporting anything.