Answer
Probably Store B with greater sales. Predicted sales might be 450,000 MP3s to 500,000 MP3s in 2014.
Work Step by Step
As we can see in the line graph, Store B is having graph in increasing order as compared to Store A. Probably Store B with greater sales. Predicted sales might be 450,000 MP3s to 500,000 MP3s in 2014.