# Estimating the cost of an assett that needs to be replenished [closed]

I am working with hard drives. For simplicity, let's say all drives have the same capacity, 1TB and all cost $100. They typically last about 4 years, when they need to be replaced. They drop in price about 50% over that period of time. They cost 100 dollars for the first for years,$50 for the next 4 years, etc.

What's the usual way of estimating the cost of something like this?

## closed as off-topic by optimal control, Giskard, FooBar, cc7768, VicAcheFeb 25 '16 at 17:16

• This question does not appear to be about economics, within the scope defined in the help center.
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• Is this an accounting question? meta.economics.stackexchange.com/questions/1526/… – Giskard Feb 22 '16 at 19:25
• I'm voting to close this question as off-topic because it belongs to another stack exhcange network. – optimal control Feb 23 '16 at 9:45
• @optimalcontrol Which one? – Giskard Feb 23 '16 at 11:53
• I'm voting to close this question as off-topic because it is not about Economics – FooBar Feb 23 '16 at 16:11
• This is the best SE for it – OneSolitaryNoob Feb 23 '16 at 16:20