Calculate payback period for following two machines.

X 4,000 18,000 4 years 5 years Saving in scrap 500 800 Saving in wages 6,000 8,000 Cost of running 800 1,000 Cost of supervision 1,200 1,800 Select the correct answer from the options given below: Original investment Life of machine (A) (B) (C) (D) Machine X 0.88 year 0.67 year 0.92 year 0.67 year Y Machine Y 3 year 2 year 2 year 3 year