Learning curve

I'm doing a decision making question and one part involves a learning curve. A company has the opportunity to take on a contract to produce 160,000 components and they will produce these in batches of 10,000. The skilled labour can produce 250 components per hour in the first batch. The learning curve is 80%. How many hours will it take to produce the 16 batches (160,000 components)? There is no mention of when the learning curve ends. Any help on this would be much appreciated!