Last Sunday a certain store copies of Newspaper A for $1 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?
a. 100p/(125-p)
b. 150p/(250-p)
c. 300p/(375-p)
d. 400p/(500-p)
e. 500p/(625-p)

Thank u!