What is the total number of live births in 2006 with 98.40% of the population as Whites and has more than 2 for the TFR?
CREATE TABLE "references" (
  "county" text,
  "live_births_2006" real,
  "gfr_2006" real,
  "tfr_2006" real,
  "whites_as_pct_of_pop" text
);
SELECT SUM("live_births_2006") FROM "references" WHERE "whites_as_pct_of_pop"='98.40%' AND "tfr_2006">2;