Answer:
The OCF will increase $9.24 for every additional unit sold
Explanation:
OCF = ((price – Variable cost)*(Quantity – Fixed cost))(1 - tax rate) + Tax rate*Depreciation
OCF at 76000 units level = ((36 - 24)(76000 - 225000))(1 - 0.23) + 0.23*550000/4
= (912000 - 225000)*0.77 + 0.23 *137500
= 528990 + 31625
= $560615
OCF at 75000 units level = ((36 - 24)(75000 - 225000)(1 - 0.23) +0.23*550000/4
= 519750 + 31625
= $551375
The sensitivity of changes in OCF to quantity sold
= $560615 - $551375/(76000 -75000)
= +9.24
Therefore, The OCF will increase $9.24 for every additional unit sold.