Ross Company; Westerfield, Incorporated; and Jordan Company 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

$($CAR$)$ for these stocks as a group. Assume all companies have an expected return equal to the market return.

Note: A negative value should be indicated by a minus sign. Leave no cells blank $-$ be certain to enter $"$O$"$ wherever required. Do

not round intermediate calculations. Round your answers to $1$ decimal place.