CSCE PUTS ADDITIONAL MARGIN ON JULY COFFEE An additional margin of 1,000 dlrs will be required on all July 1987 delivery coffee "C" contracts as of the opening of trade Monday, March 23, the Coffee, Sugar and Cocoa Exchange, CSCE, said. The March contract ends trading this week, making May and July the two "spot," or unlimited, contract months next week. Members will then have to obtain a minimum 3,500 dlrs for net long or net short positions in the May and July contracts, including a 2,500 original margin plus the additional 1,000 dlr spot charge.