By Mia O’Hare Princess Kate’s festive jumper left fans speechless after they found out its price tag. The Princess of Wales took part in her Together at Christmas carol service that aired on Christmas Eve on ITV. In the show, Kate returned to Westminster Abbey to host a special Christmas carol service and raised awareness of the importance of early childhood. She also attended a festive tea party to celebrate those mentoring children. The Princess’ outfit caught attention from viewers as she looked gorgeous in a red cardigan and red trousers. Yet many couldn’t believe the real cost of her fest…