Joanna Serra and Barbara Kent used to work in schools and the U.S. Army, respectively. Now, the sisters each make $100,000 per year selling customizable blankets, they said on Wednesday's episode of ABC's " Shark Tank ." Their business, Romeo, Michigan-based Fundraiser Blankets, brought $8 million in sales in 2024, selling plush polyester blankets to more than 4,000 schools and sports teams for $10 to $20 apiece, the co-founders said. The schools and teams then sell the blankets at a markup of