what was the net book value of property, plant and equipment, disposed of during 2012?

The Happy Hen Company is a leader in the poultry market. It produces and markets fresh and frozen commodity chicken. Its frozen products are known for their value and healthful qualities. Happy Hen's balance sheet for the fiscal year ended on December 31, 2012 and 2011 disclosed the following: In the income statement for 2012 Happy Hen disclosed the following: Depreciation expense $ 106,630 In the cash flow statement for 2012, under Cash Flow from Investing Activities, Happy Hen provided the following information: Additions to property, plant and equipment $ (213,576) Proceeds from dispositions of property, plant and equipment $ 15,294