A cell phone company offers the following basic
cell phone plan to its
customers: A customer
pays a monthly fee of
$40.00. In addition, the
customer pays $0.15 per
text message sent from the
cell phone. There is no
limit to the number of text
messages per month that
could be sent, and there is
no charge for receiving text
messages. Justin never sends a text message . What would be his total monthly cost? Explain. How do you know ?