The average (arithmetic mean) monthly balance in Company X's petty cash account on any given date is the average of the closing balances posted on the last business day of each of the past 12 months. On March 6, 1990, the average monthly balance was $692.02. What was the average monthly balance as of June 23, 1990?
(1) As of June 23, 1990, the total of all the closing balances posted on the last business day of each of the last 12 months was $45.64 less than it had been on March 6, 1990.
(2) The closing balances posted on the last business days of March, April, and May 1990 were $145.90, $3,000.00, and $725.25, respectively.