Fixed costs do not change regardless of the amount of production. However, total fixed costs and per unit fixed conts behave differently. Total fixed costs remain ____________ when production increases or decreases, but per unit foxed costs change _______________ to increases and decreases in production. meaning when production increases, per unit fixed cost ___________ and when production decreases, per unit fixed cost ___________ Examples of fixed costs are rent, manager's moethly salary, and factory insurance. They do not change no matter the amount of product prodeced.