Haggle 討價還價 , haggle and hassle

customers ask for discount while
clerks(salespeople) want to raise/keep benefit.

客戶要 討價, 老闆或店員得 還價？
or
老闆或店員要 討價, 客戶要 還價？


haggle
hassle: argue, fight, harry, harass -> chivy, chevy, chivvy
annoy continually or chronically