Complex sentence: At 17, he was the No.1 national salesman for a company selling bed linen and pots & pans and, at 21, he was the youngest person ever to sell over $1,000,000 of life insurance in his first sales year.
Split into simpler sentences: At 17, he was the No.1 national salesman for a company selling bed linen and pots & pans. At 21, he was the youngest person ever to sell over $1,000,000 of life insurance in his first sales year.