Cost to replace Serpentine on 1990 Cadillac Seville

Serpentine belt is dry and cracked. How hard is it to be replaced and what will be the cost?

Asked by for the 1990 Cadillac Seville
belt was 36 bucks at NAPA and it only takes about 5 minutes to replace using only a 1/2" breakover bar. there should be a diagram by the radiator to help with the routing