What sacrifices does Walter say have been made for Beneatha's sake? How does Beneatha react when she hears this? How does their conversation end?

Walter and Ruth have both worked to shelter and clothe Beneatha, so that she can go to school. Travis has had to wear the same shoes because they can't afford to replace them.

WALTER: I don't want nothing but for you to stop acting holy 'round here. Me and Ruth done made some sacrifices for you— why can't you do something for the family?

RUTH: Walter, don't be dragging me in it.

WALTER: You are in it—Don't you get up and go work in somebody's kitchen for the last three years to help put clothes on her back?

RUTH: Oh, Walter—that's not fair . . .

WALTER: It ain't that nobody expects you to get on your knees and say thank you, Brother; thank you, Ruth; thank you, Mama —and thank you, Travis, for wearing the same pair of shoes for two semesters —

BENEATHA (dropping to her knees): Well—I do —all right?—thank everybody! And forgive me for ever wanting to be anything at all!