<prompt> Translate the following text to EnglishKwa upande mwingine, mikataba ya bei ya kudumu, isipokuwa wale walio chini ya marekebisho ya bei, hutoa bei ya kudumu iliyowekwa mapema, kuweka hatari ya juu na jukumu kamili la gharama zote na faida au hasara inayotokana na mkataba, na kutoa motisha ya juu kwa mkataba kudhibiti gharama na kufanya kazi kwa ufanisi.  <response>: In contrast, fixed-priced contracts, except those subject to price adjustment, provide for a preestablished firm price, place maximum risk and full responsibility for all costs and resulting profit or loss on the contractor, and provide maximum incentive for the contractor to control costs and perform effectively. 