Freelance Biller

# freelance_biller.py
# This program accepts a start time and an end time and calculates
# the total bill for freelance work completed.
# by Scott Gordon

def main():
    print("***** Welcome to Freelance Biller *****\n")

    start_time = input("Enter the billing start time in 00:00 24hr format: ")
    finish_time = input("Enter the billing end time in 00:00 24hr format: ")
    pay_rate = float(input("Enter the rate of pay in 00.00 usd format: "))

    def freelance_biller(stime, ftime, rate):
        """Accepts a start time, end time and payrate, then calculates the
        bill accordngly"""
        stime_split = stime.split(":")
        ftime_split = ftime.split(":")
        hours_diff = int(ftime_split[0]) - int(stime_split[0])
        mins_dif = int(ftime_split[1]) - int(stime_split[1])
        hours_bill = rate * hours_diff
        mins_bill = rate * (mins_dif / 60)
        bill = hours_bill + mins_bill
        return f"\nClients bill is: ${bill:.2f}"

    print(freelance_biller(start_time, finish_time, pay_rate))


if __name__ == '__main__':
    main()