“Despite having been on the job for nine months, RadioShack CEO Julian Day said Monday that he still has “no idea” how the home electronics store manages to stay open. One of Day’s theories about RadioShack’s continued solvency involves wedding DJs, emergency cord replacement, and off-brand wireless telephones. Another theory entails countless RadioShack gift cards that sit unredeemed in their recipients’ wallets. Day has even conjectured that the store is “still coasting on” an enormous fortune made from remote-control toy cars in the mid-1970s.