A gas company has a monthly billing rate based on the total gas consumption by its customers. The charge varies according to the meter reading (m3). The rate structure is as follows:
|Total Consumption||Total Charge|
|For the first 10m3 or less||$6.59 (minimum bill)|
|For the next 20m3||23.73 cents/m3|
|For the next 55m3||22.71 cents/m3|
|For the next 85m3||21.78 cents/m3|
|For the next 170m3 or above||20.85 cents/m3|
Note: There are situations where the final reading may be less than the
initial reading. For example, the initial reading might be
the final reading is
0015, indicating a consumption during the month of
35m3 because the meter has 'rolled over'.
For each customer, the program should read an account number and two meter readings . represents the reading at the beginning of the month while represents the reading at the beginning of the next month. The first line of input will be the account number. The second line of input will be followed by a space then . The input will be terminated if and only if a negative account number is entered.
For each customer, your program should re-output the customer's account number and then on a new line output the final charge in dollars rounded off to two decimal places.
34567 0000 0005 12345 0000 0015 -1
Account #: 34567 Bill: 6.59 Account #: 12345 Bill: 7.78