Starbucks Corp. now sells Square Inc.'s mobile card reader in its stores, the mobile-payments company
The two companies have worked closely since August, but until now there
Square already offers its card reader at many retailers. Merchants can also sign up for Square by downloading its mobile app.
In November,
As part of the August agreement, Starbucks invested $25 million in Square. Howard Schultz, president and CEO of Starbucks, joined Square's board.










