What is the total of all YARDS with 0 SACK and less than 14 P/KO RET?
CREATE TABLE "high_school_statistics" (
  "year" text,
  "tckl" real,
  "sack" real,
  "p_ko_ret" real,
  "yards" real
);
SELECT COUNT("yards") FROM "high_school_statistics" WHERE "sack"=0 AND "p_ko_ret"<14;