Charles Corp makes small motorcycles. The monthly demand ranges from 80 to 100 motorcycles. The average demand is 92 motorcycles. The plant operates 300 hours a month. Each cycle takes approximately 1.5 hours. If the company adds a new line of scooters, initial demand will be 20 per month. Each scooter will take 1 hour to make. To offset approaching production capacity, expanding the assembly line is possible. This will decrease manufacturing time for all products by 20%. However, this will increase the costs of cycles from $400 to $500 and scooters from $200 to $240. The change will also cause increases in prices from $700 to $750 for cycles and from $450 to $500 for scooters. Required: What are the expected monthly contribution margins if scooters are made with the current assembly line and with the new assembly line