What are the formulas and ways to do these: 1. Allocation problems costs to departments 2. Return on investment with targeted income 3. Calculate (a) return on investment and (b) investment center residual income. 4. Analyzing whether to take a special offer or not. 5. Calculate contribution margin by unit or a portion thereof 6. A segment elimination problem 7. Payback period for a piece of equipment 8. Determine rate of return 9. Calculate internal rate of return