Entrepreneur Aaron Powell gets an offer from Barbara Corcoran, the only Shark who's still in -- but she wants a big chunk of the company. Aaron and Barbara go back and forth, countering with different blends of equity and money, but can they find a common ground where they're both happy? From season 12, episode 18 of 'Shark Tank.' Watch 'Shark Tank' FRIDAY 8|7c on ABC, streaming, on demand, and Hulu.