SCHERING-PLOUGH <SGP> MULLS DR. SCHOLL'S SALE Schering-Plough corp said it is considering the sale of its Dr. Scholl's businesses in Europe, Latin America and the Far East, which had sales of about 150 mln dlrs in 1986. The company said the transaction is not expected to have a material impact on earnings. It said it has engaged Merrill Lynch and Co Inc <MER> to assist in the sale process. Schering said it will retain Dr. Scholl's businesses in the U.S., Canada and Puerto Rico, which had sales of about 135 mln dlrs last year.