A cell phone plan costs ​$30.90 per month for 500 minutes of talk time. It costs an additional ​$0.08 per minute for each minute over 500 minutes. To get​ e-mail access, it costs ​20% of the price for 500 minutes of talk time. Your​ bill, which includes​ e-mail, is the same each month for 5 months. The total cost for all 5 months is ​$209.80. Write and solve an equation to find the number of minutes of talk time you use each month. Please Help!