What is the fixed charge for the user who had a tariff of 11.30?
CREATE TABLE "revised_electricity_tariffs_effective_fr" (
  "user" text,
  "unit_k_wh_time_range" text,
  "tariff_rs_k_wh" text,
  "fixed_charge_rs_k_wh" text,
  "fuel_adjustment_charge_pct_of_total_energy_charge" text,
  "max_demand_charge_rs_k_va" text
);
SELECT "fixed_charge_rs_k_wh" FROM "revised_electricity_tariffs_effective_fr" WHERE "tariff_rs_k_wh"='11.30';