Kari is comparing the cost of cell phone services. The phone she wants costs $200 at Hillsdale Cellular, and the unlimited calling plan through their carrier would cost $2 per day. At Griffith Electronics, Kari could purchase the same phone for $250 and also get an unlimited calling plan for $1 per day. After some number of days, the two options would end up having the same total cost. How long would that take? PLS HELP