english: When Proctor &amp; Gamble went from 26 different kinds of Head &amp; Shoulders to 15, they saw an increase in sales by 10 percent.
non_english: Keď Proctor &amp; Gamble prešli z 26 rôznych druhov Head &amp; Shoulders na 15, videli, že ich predaj sa zvýšil o 10 percent.