In June 2005, Eastman Kodak announced that it no longer would produce black-and-white photographic paper—the type used to develop photographs by a traditional darkroom process. Kodak based its decision on the substitution of digital photography for traditional photography. In making its exit decision, did Kodak compare the price of its paper and average variable cost (at its optimal output)? Alternatively, did Kodak compare the price of its paper and average total cost (again at its optimal output)?