Mathematics · Relevant Costing

GS Co is considering a one-year contract requiring four skilled employees. They can be recruited on a one-year contract at $40,000 per employee. They would be supervised by an existing manager earning $60,000 per year, who will spend 10% of their time on this. Alternatively, the company could retrain existing employees earning $30,000 per year at a total training cost of $15,000, but these employees would need to be replaced at a total cost of $100,000. What is the relevant labor cost of the contract?