Here’s one way Barnes & Noble plans to invest some of the cash flow freed up by suspending its dividend: AdAge reports the company has hired Interpublic’s Mullen to “refresh its brand with an effort that includes an estimated $40 million investment in marketing and a new look for stores.” That amount is expected to double BN’s previous marketing spend. Mullen replaces Omnicom Group’s Merkley & Partners.AdAge Following yesterday’s pre-market announcements, Barnes & Noble’s shares fell more than 14 percent in full-day trading, declining 2.67 to finish at $15.94. The stock is falling further today, down another 4.5 percent so […]