A fund begins the year with 500 on Jan 1. A deposit of 200 is made on April1 and a deposit of 300 is made on July 1. There are no other deposits or withdrawals during the year. The fund balance at the year-end is 1,100. The funds time-weighted balance on April 1 (before the deposit) was 575, what was the fund balance on July 1 before the deposit?