A new telephone directory is to be published. Before publication entries are proofread for errors and any corrections made. Experience suggests that, on average, 0.1% of the entries require correction and that entries requiring correction are randomly distributed. The directory contains 800 pages with 300 entries per page. Two methods for making corrections are proposed: Method A (costs 50p per page containing one correction and £1.50 per page containing two or more corrections), and Method B (costs £1 per page containing one or more corrections). Which method, based on cost, should be used?