A student has a savings account earning 9% simple interest. She must pay $1700 for first-semester tuition by September 1 and $1700 for second-semester tuition by January 1. How much must she earn in the summer (by September 1) to pay the first-semester bill on time and still have the remainder of her summer earnings grow to $1700 between September 1 and January 1? (Round your answer to the nearest cent.)