At the rate where 1800 kwh/kwp•y is 1.1, what is the value of 2400 kwh/kwp•y?
CREATE TABLE "table1_13690575_4" (
  "cost" text,
  "2400_k_wh_k_wp_y" text,
  "2200_k_wh_k_wp_y" text,
  "2000_k_wh_k_wp_y" text,
  "1800_k_wh_k_wp_y" text,
  "1600_k_wh_k_wp_y" text,
  "1400_k_wh_k_wp_y" text,
  "1200_k_wh_k_wp_y" text,
  "1000_k_wh_k_wp_y" text,
  "800_k_wh_k_wp_y" text
);
SELECT "2400_k_wh_k_wp_y" FROM "table1_13690575_4" WHERE "1800_k_wh_k_wp_y"='1.1';