～合せ
～あわせ · ～awase · JLPT N1 · noun
in all
Compound: 全(zen, all) + 合わせ(awase, combining); ～合せ means 'combined in all' or totalled together.
合 — 乛 (lid/roof) + 口 (mouth)
Originally a pictograph of a lidded vessel — a cover (亼) closing over an opening (口) — giving the core sense of 'come together, join, fit.' From 'fit/match' it extended to 'combine, unite, agree' and to measure-word uses. The reading hé reflects this 'joining' meaning.