The previously reported merger between Family Dollar and Dollar Tree just got a little more interesting. According to reports, competitor chain Dollar General has also dropped a hefty bid—in the sum of $8.9 billion. In an article in The New York TImes, it was noted that the company is also willing to pay the $305 million break-up fee that would be owed to Dollar Tree if that deal were broken off. The deal would make Dollar General a leader in the marketplace....