Problem Solving

Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for $1.25 each, and the store sold no other newspapers that day. If r percent of the store's revenues from newspaper sales was from Newspaper A and if p percent of the newspapers that the store sold were copies of newspaper A, which of the following expresses r in terms of p?

1) 100p / (125 - p)
2) 150p / (250 - p)
3) 300p / (375 - p)
4) 400p / (500 - p)
5) 500p / (625 - p)

Will provide the OA after some discussion