TSENG <TSNG> SEES SALES INCREASE FIRST QTR 1987 Tseng Laboratories Inc said it expects first quarter 1987 sales to exceed total sales for the entire 1986 year, and said it expects earnings for the quarter to grow at a faster rate than sales. Tseng posted total revenues for 1986 of 4,255,731, and net income of 258,125, or 14 cts per share. Jack Tseng, president of the company, attributed the high expectations to increased orders from major costomers, as well as accelerated business from its growing reseller network. Tseng posted first quarter 1986 sales of 549,950, and net income of 19,163, the company said.