So owl is a carnivorous bird. There are exceptions to this though, as some species such as Burrowing Owls may feed on seeds and fruits when prey is lacking, but for the most part they are carnivorous though.
There are 16 ounces in one pound. So to get one pound of cashews, you need to buy 16 ounces. If each ounce costs $.40: 16 ounces x $.40 per ounce = $6.40 So it costs $6.40 per pound of cashews. No, you can't buy a pound.
Costco refills dozens of specific Canon, Dell, HP, and Lexmark cartridges; you can get a list of the models in a paper brochure as well as on Costco's Website. Prices range from $8 to $10 per refill, which is considerably cheaper than buying a new cartridge.