Last month, Sprockets, Inc., manufactured 12,000 widgets. The firm’s total cost for making the widgets was $240,000. Of that amount, $60,000 was due to fixed costs, […]
The Earth is approximately 4.5 billion years old. Life first appeared 3.5 billion years ago with prokaryotic cells. The first eukaryotic cell did not appear until 2.5 billion […]