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 $"0"$ wherever required. Do not round intermediate calculations. Round your answers to $1$ decimal place.

$\backslash$table$[[$Date$,\backslash$table$[[$Ross Company$],[$Market$],[$Return$]],\backslash$table$[[$Company$],[$Return$]],$Westerfield, Incorporated,Jordan Company$],[,$Market,Company,,,Market,Company$],[$Date$,$Return,Return,Date,,Return,Return$],[$July $12,-0\mathrm{.}4,-0\mathrm{.}1,$February $8,-0\mathrm{.}4,-0\mathrm{.}1,$October,$1,1\mathrm{.}6,0\mathrm{.}8],[$July $13,1\mathrm{.}4,0\mathrm{.}3,$February $9,-0\mathrm{.}5,-0\mathrm{.}1,$October,$2,1.,0\mathrm{.}8],[$July $16,0\mathrm{.}2,0\mathrm{.}7,$February $10,0\mathrm{.}2,0\mathrm{.}6,$October,$3,0\mathrm{.}5,1\mathrm{.}3],[$July $17,-0\mathrm{.}6,-0\mathrm{.}2,$February $11,0\mathrm{.}4,2\mathrm{.}3,$October,$6,-0\mathrm{.}1,-0\mathrm{.}5],[$July $18,-0\mathrm{.}6,1\mathrm{.}3,$February $12,-0\mathrm{.}1,0\mathrm{.}1,$October,$7,-2\mathrm{.}0,-0\mathrm{.}5],[$July $19,-2\mathrm{.}1,-0\mathrm{.}5,$February $15,1\mathrm{.}0,1\mathrm{.}5,$October,$8,1\mathrm{.}0,0\mathrm{.}4],[$July $20,-0\mathrm{.}9,-1\mathrm{.}4,$February $16,0\mathrm{.}7,0\mathrm{.}3,$October,$9,-0\mathrm{.}5,-0\mathrm{.}8],[$July $23,0\mathrm{.}6,0\mathrm{.}4,$February $17,-0\mathrm{.}1,0\mathrm{.}0,$October,$10,0\mathrm{.}1,-0\mathrm{.}1],[$July $24,1\mathrm{.}4,0\mathrm{.}0,$February $18,1\mathrm{.}8,0\mathrm{.}4,$October,$13,-0\mathrm{.}4,-0\mathrm{.}6]]$

$\backslash$table$[[\backslash$table$[[$Days from$],[$announcement$]],$Ross,W'field,Jordan,Sum,$\backslash$table$[[$Average abnormal$],[$return$]],\backslash$table$[[$Cumulative$],[$average residual$]]],[,,,,,],[-4,,,,,,],[-3,,,,,,],[-2,,,,,,],[-1,,,,,,],[1,,,,,,],[3,,,,,,]]$