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.

$\backslash$table$[[\backslash$table$[[$Days from$],[$announcement$]],$Abnormal returns $(R_i-R_M),\backslash$table$[[$Average abnormal$],[$return$]],\backslash$table$[[$Cumulative$],[$average residual$]]],[$Ross$,$W'field,Jordan,Sum$],[-4],[\backslash$table$[[-4]]],[\backslash$table$[[-3],[-2]]],[\backslash$table$[[-2],[-1]]],[\backslash$table$[[-1],[0]]],[\frac{0}{1}$