The data for a Cears investment center is given below.
1/1/12 12/31/12
Current assets $ 300,000 $ 700,000
Plant assets 3,000,000 4,000,000
Idle plant assets 250,000 330,000
Land held for future use 1,200,000 1,200,000
The controllable margin is $760,000.
What is the return on investment for the center for 2013?
19%
21%
22.8%