In a B2B e-commerce environment, a company is considering implementing a new AI-driven recommendation engine to enhance customer experience and increase sales. The engine uses machine learning algorithms to analyze customer behavior and preferences. If the company expects a 15% increase in sales due to improved recommendations, and their current monthly sales are $200,000, what will be the projected monthly sales after implementing the recommendation engine? Additionally, if the implementation costs $50,000 and the company aims to recover this cost within the first three months, what percentage increase in sales would be necessary each month to achieve this goal?