She can purchase 26 songs. To find you answer you would multiply $1.2 times 4 to get the cost for the music videos. You would get 48 then you subtract 48 from 80. Then you would divide the answer you got which would be 32 by 1.2 to find how many songs you can purchase. Your final answer would be 26.
Well to be honest, you need to straight forward to her and tell her that you do not appreciate her copying you and tell her you dont want to be rude or anything, but this needs to stop.