Open Question: C++ Programming question please help?

An electricity board charges the following rates from domestic users to discourage high consumption of eneryg: for first 100 units -- 60 paise per unit for first 200 units -- 80 paise per unit for first 300 units -- 90 paise per unit All users are charged a minimum of Rs 50. if the total amount is more than Rs. 300, then an additional surcharge of 15% is added. Write a C++ program to read the names of users and number of units consumed and print out the charges with names clearly specify all data types