How much is the total value of kau sĕb UNGEGN ?
CREATE TABLE "numbers_from_30_90" (
  "value" real,
  "khmer" real,
  "word_form" text,
  "ungegn" text,
  "ala_lc" text,
  "other" text
);
SELECT SUM("value") FROM "numbers_from_30_90" WHERE "ungegn"='kau sĕb';