Within the relevant range, which of the following statements is true with respect to fixed costs per unit?

a) They will increase as production volume increases.
b) They will decrease as production volume decreases.
c) They will remain the same as production volume levels change
d) They will decrease as production volume increases.

The stock of grommet corporation, a u.s. company, is publicly traded, with no single shareholder owning more than 5 percent of its outstanding stock. grommet owns 95 percent of the outstanding stock of staple inc., also a u.s. company. staple owns 100 percent of the outstanding stock of clip corporation, a canadian company. grommet and clip each own 50 percent of the outstanding stock of fastener inc., a u.s. company. grommet and staple each own 50 percent of the outstanding stock of binder corporation, a u.s. company. which of these corporations form an affiliated group eligible to file a consolidated tax return?