power-bill-calculator-revisited

A program that calculates a power utility bill based on determined usage.

Assignment

Write a program that will ask for the customer’s last and current meter reading in Kilowatt Hours (KwHs). Determine the amount of usage for the month and calculate a sub total (before tax) and a total amount due (tax included) using the following constraints.

Constraints

• Rate A: For 500 KwHs or less = $0.0809 / KwH
• Rate B: For 501 to 900 KwHs = $0.091 / KwH
• Rate C: For greater than 900 KwHs = $0.109 / KwH
• Utilities Tax is 3.46% regardless of usage.

Requirements

• Create a separate (external to the main class) subclass MyUtility().
• Rate and tax variables should be private to the subclass.
• Use a constructor to initialize the default reading values to 0.
• Use another constructor to set the reading values.
• Use set and get methods in MyUtility() to determine the usage, rate, subtotal, tax, and final bill.
• The set methods should be private.
• Format all output as follows:
  • Usage to 1 decimal place, KhWs
  • Rate to 4 decimal places, monetary
  • Subtotal to 2 decimal places, monetary
  • Taxes to 2 decimal places, monetary
  • Total to 2 decimal places, monetary
• Implement a loop to return and enter new values (run the program again) if the user wishes to.

Notes

• Set methods should do all the computation.
• Set methods can call other set methods (method chaining).