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The following are the investment and operating costs for two machines, J and K.

Year: 0, 1, 2, 3
J: 11000, 1200, 1300
K: 13000, 1200, 1300, 1400

The WACC is 10.5%. How do I use the WACC to determine which machine is a better buy?

  • Finance -

    n=2 for machine J, =3 for machine K

    We assume machine J lasts 2 years with no salvage value, same for machine K, but three years.

    Case J:
    annual expense over 2 years

    Case K:
    annual expense over 3 years

    Since annual expense for machine K is lower, it is a better buy.

    Another way to do this is compare the present values of buying 3 machine J with the PV of 2 machine K (total 6 years in each case).
    It is less realistic because the machines may not cost the same 2,3 or 4 years from now.

    Here it is anyway:
    Machine J:
    Machine K:
    Again, Machine K has a lower (negative) cash flow over 6 years.

  • Finance -

    Many thanks for your help again, MathMate!

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