What is the fixed charge for the user with a unit/time range of i-2: peak (18:30-22:30)?
create table table_25479607_3 (fixed_charge___rs__kwh_ varchar, unit__kwh__time_range varchar, PRIMARY KEY (fixed_charge___rs__kwh_))
select fixed_charge___rs__kwh_ from table_25479607_3 where unit__kwh__time_range = "i-2: peak (18:30-22:30)"