Need help with all 3 and please explain why.

Use the following information to answer the next three questions.

Assume the following information for ROK Division Sales: $2,000,000 Variable Costs: $700,000 Controllable Fixed Costs: $300,000 Other Fixed Costs: $500,000 ROK Division has operating assets of $2,000,000

Assuming ROK Division is cost center, what are the controllable costs the the division manger should be evaluated on? (e,g. $100,000)

Assuming ROK Division is a Profit Center, how much is Controllable Margin? (e.g. $400,000)

Assuming ROK Division is an Investment Center, what is ROK Division's Return on Investment? (e.g. 10%)