6 . A fund earned a net investment income lie . Ending Balance ( Starting Balance + Deposits / Withdrawals ) ) of 9200 during 1999 . The beginning and ending balances of the fund were 100000 and 129200 , respectively A deposit was made at time K during the year . No other deposits or withdraws were made . The fund earned 8% in 1999 using the dollar - weighted method Determine then date corresponding to time K ( a ) April 1 ( 6 ) May 1 ( C ) July 1 ( d ) Sept . 1 ( e ) Oct . 1