Carrier M offers Plan M-1 for $60 a month with unlimited data and texts. No minutes are included. You pay $0.12 per minute for the first 100 minutes, $0.14 per minute for minutes 101-200, $0.16 per minute for minutes 201-300, $0.18 per minute for minutes 301-400, and $0.21 per minute for any additional minutes beyond 400. Consider the graph of total plan cost as a function of the number of minutes for Plan M-1. What is the SLOPE of the graph at the point where the number of minutes is 250? Remember that total plan cost includes taxes and the regulatory and administrative fee as given in the Module. taxes=19% regulatory and administrative fee=2.52