Ross Company. Westerfield, incorporated, and Jordan Compary announced a new agreement to market their respective products in China on July 18, February 12, and October 7, respectively Given the information below, calculate the cumulative abnormal return iCARj for these stocks as a group. Assume all companies have an expected return equal to the market return. Note: A negative value should be indicoted by a minus slgn. Leove no cells blonk - be certain to enter " 0 " wherever required. Do not round intermediote colculations. Round your answers to 1 decimal ploce