In Chapter 23 one of the homework assignments is from a half-sheet handout.  Students may use an unused sheet from another assignment in the working paper booklet, plain paper, or the link below for an Excel file.

In Chapter 25 one of the pages is missing from the printed booklet of Working Papers.  Students could use a sheet of blank paper, another (unused) page from the Working Papers, or the link to the file below to substitute for the missing page.