abatement agio allowance backset backsliding backward motion backward step bank discount breakage cash discount chain discount charge-off concession curtailment cut cutback deduction depreciation discount drawback kickback lapse penalty penalty clause percentage premium price reduction price-cut pullback reaction rebate rebatement recession recidivation recidivism reduction reentry refluence reflux refund regress regression relapse retrenchment retroaction retrocession retroflexion retrogradation retrogression retrusion return salvage setback setoff sternway tare throwback time discount trade discount tret underselling write-off