Question: 3. Two machines M and M with unequal life span have the following costs. If interest rate is 8%, which one of the machines

3. Two machines M and M with unequal life span have the

3. Two machines M and M with unequal life span have the following costs. If interest rate is 8%, which one of the machines is more economical (Use PW method?) Initial cost Maintenance cost yearly Salvage value Service life M 28000 4000 1800 3 M 23000 6000 1300 2

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