Referring to the table below, hiring a driver costs $10. Each machine costs $100. Which method should he use and why?

Method 1: 20 drivers 10 Machines

Method 2: 50 drivers 2 Machines

Method 3: 100 drivers 0 Machines

Method 4: 10 drivers 12 Machines

My breakdown:

Method 1:20 drivers * $10 in driving costs = $200 + 10 machines (each cost $100 each) = $1000

Total cost is $1200.

Method 2:50 drivers * $10 in driving costs = $500 + 2 machines (each cost $100 each) = $200

Total cost is $700

Method 3:100 drivers * $10 in driving costs = $1000 + 0 machines (each cost $100 each) = $0.00

Total cost is $1000

Method 4:10 drivers * $10 in driving costs = $100 + 12 machines (each cost $100 each) = $1200

Total cost is $1300

Is method 2 the best option to use? Why? Is it because it is cheap? Yet, it still has him having more drivers?