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InternetLite Corporation is an Internet service provider that charges customers a flat rate
of $7.99 for up to 10 hours of connection time. Additional hours or partial hours are
charged at $1.99 each. Write a function charge that computes the total charge for a
customer based on the number of hours of connection time used in a month. The function
should also calculate the average cost per hour of the time used (rounded to the nearest
cent), so use two output parameters to send back these results. Write a second function
round_money that takes a real number as an input argument and returns as the function
value the number rounded to two decimal places. Use this function for rounding the
average cost per hour of the time used to the nearest cent. Write a main function that
takes data from an input file usage.txt and produces an output file charges.txt. Your
program should handle an input file of any size. The data file format is as follows:
Line 1: current month and year as two integers
Other lines: customer number (a 5-digit number) and number of hours used
Here is a sample data file and the corresponding output file:

Data file usage.txt
10 2009
15362 4.2
42768 11.1
11111 9.9

Output file charges.txt
Charges for 10/2009

Customer Hours used Charge Average cost
15362 4.2 7.99 1.90
42768 11.1 11.97 1.08
11111 9.9 7.99 0.81

 

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