'''
Create a customer class
Add a constructor with parameters first, last, and phone_number
Create public attributes for first, last, and phone_number

STUDENT MUST ALSO MODIFY INVOICE CLASS TO USE THIS CLASS
SEE INVOICE file FOR INSTRUCTIONS
'''
class customer:

    def __init__(self, first, last, phone_number):
        self.first = first
        self.last = last
        self.phone_number = phone_number