NEW YORK — Toyota Motor Corp. is reacting to the slump in U.S. auto sales by further cutting North American production, slashing executives' compensation up to 30 percent and offering buyouts to about 18,000 workers. "We've taken responsible, step-by-step actions to address this issue in recent months, and we hope the new measures will help us adjust while protecting jobs," said Jim Wiseman, vice president of external affairs for Toyota Motor Engineering & Manufacturing North America in a statement. The company said Thursday it will cut production days at some U.S.