i agree with your answer for (a).
the saving is 10% of the original cost
the saving is £78809 per year
What was the original cost?
Can you please confirm if part a is correct and help with the part b, im not sure how i would determine what the losses were, i do know that the company makes approx 78 k for 4 years after the software purchase is the correct answer simply 10% of the earnings?