Jose started a small business and wants to determine when the business will become profitable. His operating costs can be expressed as y=$10,000+$3,000x, where x is the number of months he stays in business. His sales revenues can be expressed as y=$4,500x, where x is the number of months he stays in business. How many months will it take for his business to become profitable? Enter your answer as a whole number of months, such as: 3 months