suppose Marvel Comics and DC Comics each produced a book that can be released on January 26 or July 4. The tablebelow shows the prot to each rm depending upon when the books are released. Assume prots only depend on the dates of release. For instance, if Marvel acquires the distribution rights to DC's book and distributes them on January 26 (Marvel's book) and July 4 (DC's book), then the prots are still 30 and 90 for these two books, respectively, and Marvel receives both protswhoever owns the distribution rights of a book also owns the prot from that book.

		DC
		January 26	July 4
Marvel	January 26	20, 20	30, 90
July 4	90, 40	50, 50

What is the lowest price that DC would accept to sell the rights to its book?