Can you explain me how the attached file values and graph came if I just know that NPV was-297,612 which is considered in 0%. Also Explain me how to make the graph . I am attaching the file with the question.

Change in NPV Change % Volume Revenue Labor Salvage -30% -392,391 -402,921 -244,958 -316,714 -20% -360,798 -367,818 -262,509 -310,347 -10% -329,205 -332,715 -280,061 -303,980 0% -297,612 -297,612 -297,612 -297,612 10% -266,020 -262,509 -315,164 -291,245 20% -234,427 -227,406 -332,715 -284,878 30% -202,834 -192,303 -350,267 -278,511 Chart Title -40% -30% -20% -10% 0 0% -50,000 10% 20% -100,000 -150,000 -200,000 -250,000 -300,000 -350,000 -400,000 -450,000 Volume Revenue Labor Salvage 30% 40%