The group ended up selling just three cookies, raising $1.50.
3 cookies = $1.50.
That means you have a white woman, a hispanic, and a black.
Or a white man and two blacks
Or three hispanics.
The women, blacks and hispanics may have been offended, but at least some of them bought at bargain prices.
Also, were Asians not allowed to buy cookies at all? Maybe there was a separate but equal cookie table for them.