Keep or Replace?

required:

company is deciding if they want to buy a new machine or whether they want to keep using old machine

calculate the difference in total costs over the next 5 ( five) years

under both alternatives:

column 1 old machine

column 2 new machine

rows:

1) original costs:

old machine 22,400

new machine $27,500

2) Useful life:

old 8 years

new machine 5 years

3) current age:

old mach 3 years

new mac 0

4) remaining life:

old machine 5 years

new machi 5 years

5) accumulated depreciation:

old mach 8,400

new mach 0

6) disposal value:

old mach 5,000

new 0

7) book value:

old mach 14,000

new 0

row 8) annual operating costs:

old mach 10,600

new mach 5,400

please show work

keep or replace ?