Assignment:
A phone company charges a different rate for a local call than a long distance call. A local call costs $0.15 per minute and a long distance call costs $0.45 per minute. Last month a customer made 320 minutes of calls. If the total cost of the calls was $99.00, how many minutes of each type of call did the customer make?
Provide complete and step by step solution for the question and show calculations and use formulas.