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Boxing referees play a crucial role in the sport, and their earnings reflect this responsibility. Typically, they earn between $200 to $2,500 per match, depending on the event's scale. Experienced referees in high-profile bouts can make significantly more, sometimes topping six figures annually.

In Ohio, surrogates can earn between $40,000 and $60,000 per pregnancy, depending on experience and specific agreements. Additional compensation may include medical expenses and bonuses, making the role financially rewarding while supporting hopeful parents.

Pilates studio owners can earn between $40,000 and $150,000 annually, depending on location, client base, and operational costs. Factors like class size, membership models, and additional services heavily influence overall profitability, making careful planning essential.

Roofing company owners can earn between $50,000 to over $150,000 annually, depending on market demand, business size, and region. With efficient management and strategic pricing, profit potential can significantly increase, making it a lucrative venture.

Casino owners often rake in significant profits, with some leading operators reporting annual revenues exceeding $10 billion. Their earnings stem from diverse sources, including gaming, dining, and entertainment, showcasing the industry's lucrative nature.