For 25 years a man deposited R400 at the end of each 6 months in a bank which credits interest on January 1 and July 1 . The first deposit was made on July 1, 1927. The bank paid interest at 3% compounded semi - annually until January 1, 1937, when the rate dropped to 2% p.a. compounded semi annually. From January 1, 1942, the rate was 1% compounded semi - annually. How much is in his account on January 1,1952