but when he received the owner change order he issued a change order to P What are the known costs? What is the total estimated costs at completion? $385,000;$410,000 $235,000;$410,000 $385,000;$470,000 but when he received the owner change order he issued a change order to P What are the known costs? What is the total estimated costs at completion? $385,000;$410,000 $235,000;$410,000 $385,000;$470,000