5.6 Computer diskettes, which do not meet the quality required for high-density (1.44 Mb) diskettes, are sold as double-density diskettes (720 kb) for 80p each. High-density diskettes are sold for £1.20 each. A firm samples 30 diskettes from each batch of 1000 and if any fail the quality test the whole batch is sold as double-density diskettes. What are the types of error possible and what is the cost to the firm of a Type I error?