Topper plans to make semi-annual savings contributions of $3,700. His first semi-annual savings contribution is expected later today. Topper expects to earn 7.30 percent per year. How many semi-annual savings contributions of $3,700 does Topper need to make in order to have $410,000? Round your answer to 2 decimal places (for example, 2.89, 14.70, or 6.00).