S. AFRICAN TRADE SURPLUS RISES SHARPLY IN FEBRUARY South Africa's trade surplus rose to 1.62 billion rand in February after falling to 906.2 mln in January, Customs and Excise figures show. This compares with a year earlier surplus of 958.9 mln rand. Exports rose slightly to 3.36 billion rand in February from 3.31 billion in January but imports fell to 1.74 billion from 2.41 billion. This brought total exports for the first two months of 1987 to 6.67 billion rand and imports to 4.15 billion for a total surplus of 2.52 billion rand against 1.71 billion a year earlier.