PARIS (Reuters) -French luxury group Kering outlined plans to increase annual sales of its star label Gucci to 15 billion euros in the medium term in slides published on Thursday after an investor presentation. Sales at Gucci, the group’s main label and profit engine, totalled 9.73 billion euros in 2021. The group expects to grow the brand’s sales through a combination of increased traffic in stores, expanded store networks and higher prices. It plans to raise prices periodically and continue increasing the proportion of higher end products in its collections. Examples given in the slides incl…