Answer:
Controllable margin =$125,000
Return on investment = 20%
Step-by-step explanation:
Controllable margin is the difference between the sales revenue and the controllable cost. Controllable costs include variable and fixed cost directly under the control of the manager and which are influenced by his decisions.
Controllable margin - Sales revenue - variable cost - controllable fixed cost
Controllable margin= $500,000 - $300,000 - 75,000 = $125,000
Controllable margin =$125,000
Return on investment = (controllable margin/ Average investment) × 100
= (125,000/625,000) × 100 = 20%
Return on investment = 20%