Wahl’s Discount Stores stocks toy race cars. The normal purchase price is $5.00 per unit for these cars, but the store faces the following quantity discount schedule: For orders between 1000 to 1999, the price drops to $4.80/unit; for orders of 2000 or more, the price drops further to $4.75/unit. The ordering cost is $49 per order, annual demand is 5000 cars, and the inventory carrying cost is 20% of the material cost. What order quantity will minimize total cost?

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?