Sparks Inc., a firm that manufacturers low voltage halogen lamps, currently has a 40% share of a 1 million unit market. The firm has extensive customer knowledge, as well as extensive competitor knowledge. The three largest competitors of Sparks Inc. have market shares of 5%, 10%, and 15%, respectively. The percentage cost of goods sold by Sparks Inc. is 40%. The percentage cost of goods sold by its three largest competitors is 30%, 30%, and 20%. What is the cost advantage index of Sparks Inc.