First job 980 sq foot deck. I quoted $120 and a optional $45 for anti skid tape installed. Since the clients reason for washing was liability for slipping. Second job 800 sq ft roof. $135 Third job 4100 sq ft two story house and 460 sq ft deck. I discounted this to $430. I might still get the last job but the other two I havent heard back from. I believe my prices are right along the industry standard. Any suggestions?