Herbalife Ltd. reported fourth quarter net sales fell 11% to $1.1 billion, primarily due to the unfavorable impact of currency fluctuations.   However, for the 12 months ended Dec. 31, 2014, the company reported net sales rose 3% to $5.0 billion.   Michael Johnson, chairman and CEO stated, “2014 was a record year in terms of net sales, volume and sales leader retention. It was also a year of transition, as we continue to implement changes that we believe will create a stronger company with the i...