What is the Standard cost (USD) by hans Oischinger Creator ?
CREATE TABLE "for_the_x_window_system" (
  "name" text,
  "creator" text,
  "latest_stable_version" text,
  "standard_cost_usd" text,
  "software_license" text
);
SELECT "standard_cost_usd" FROM "for_the_x_window_system" WHERE "creator"='hans oischinger';