Where does “sous-total” come from?

sous-total (French) comes from French total, from Middle French total, from Old French total, from Medieval Latin totalis, from Latin tōtus, from Latin tot, from Proto-Indo-European toti, from Proto-Indo-European só — this; that.

sous-total (French): subtotal

Definitions

subtotal

Ancestry of “sous-total”, step by step

Step	Language	Word	Meaning
1	French	total	total; perfect
2	Middle French	total	—
3	Old French	total	—
4	Medieval Latin	totalis	total
5	Latin	tōtus	whole, all, entire, total, complete, every part
6	Latin	tot	so many
7	Proto-Indo-European	toti	so many
8	Proto-Indo-European	só	this; that

Every word from Proto-Indo-European só →Every word from Proto-Indo-European toti →Every word from Latin tot →