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Business + Coffee: #ImWithKap jerseys sell out, double standard in tennis, Jimmy Buffett invests in weed

Tuesday, September 11: Colin Kaepernick #ImWithKap jersey sold out in hours after being offered, with all proceeds to be donated to Know Your Rights Camp; USTA to review its policies following the controversial U.S. Open final with Serena Williams; entertainer Jimmy Buffett partners with a cannabis startup. Yahoo Finance's Melody Hahm pours over today's Business + Coffee.