What is the sum of Height (cm), when the Weight (kg) is 90?
CREATE TABLE "list_of_united_states_national_ice_hocke" (
  "position" text,
  "name_v_t_e" text,
  "height_cm" real,
  "weight_kg" real,
  "birthplace" text,
  "1999_2000_team" text
);
SELECT SUM("height_cm") FROM "list_of_united_states_national_ice_hocke" WHERE "weight_kg"=90;