The metro train costs $6.30 round trip to ride to work each day. you work 4 days a week (16 days a month). if you can get a monthly pass for $78, how much can you save by buying the pass? $20.40$18.80$24.20$22.80

The first step is finding how much the metro cost to ride monthly since its a monthly pass. If she rides 16 times for 6.30 every time then you multiply them you should get 100.8. now subtract the original cost before the monthly pass to after. you should get 22.8