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URL:  http://boards.fool.com/if-he-postpones-his-trip-the-cost-of-his-trip-will-30376701.aspx

Subject:  Re: Sunk costs Date:  11/12/2012  12:43 PM
Author:  ed1007 Number:  306412 of 308355

If he postpones his trip the cost of his trip will change. If he ignores the cost of the ticket he purchased then when comparing the two options go now or go later, the costs of the two options will be different. As a result the cost of the plane ticket does show up in the consideration of when to go. The cost of course is only one part of the decision but for many people and in many cases it is the deciding factor.

I think the proper way to handle this from a purely financial perspective is to calculate the cost of going now, NOT including the plane ticket, and compare that to going at some point in the future including the NEW travel he would need to purchase. Of course is money is no object then the sunk cost would not have mattered in the first place.
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