Read the footnote referring to Home Depot's decision to close all of its remaining big box stores in China. Identify the incremental, sunk, and opportunity costs associated with this decision. Assume that any cost savings will be invested elsewhere in more productive stores.

Footnote:

CHINA STORE CLOSINGS

In fiscal 2012, the Company closed its remaining seven big box stores in China. As a result of the closings, the Company recorded a total charge of $145 million, net of tax, in fiscal 2012. Inventory markdown costs of $10 million are included in Cost of Sales, and $135 million of costs related to the impairment of Goodwill and other assets, lease terminations, severance and other charges are included in SG&A in the accompanying Consolidated Statements of Earnings.