Answer:
20.02%
Step-by-step explanation:
Formula : 
n = 1,2,3,4,5
Substitute the values in the formula :


Solving for IRR using calculator
IRR = 20.02
Hence the internal rate of return if the initial cost of the project is $275,000 is 20.02%
43 is between the 40 and 45
138,000/ 128,000 = 7.8125% Just divide new value into old value