A cell phone company offers two different plans. Plan A costs $90 per month for unlimited talk and text. Plan B costs $0.20 per minute plus $0.10 per text message sent. You need to purchase a plan for your 14-year-old sister. Your sister currently uses 1,750 minutes and sends 1,600 texts each month. (1) What is your sisters total cost under each of the two plans? (2) Suppose your sister doubles her monthly usage to 3,500 minutes and sends 3,200 texts. What is your sisters total cost under each of the two plans?