Z Corporation Had 2012 Taxable Income of $600,000 Before Considering $\quad$

Z Corporation had 2012 taxable income of $600,000 before considering the following: Gain on the sale of equipment $\quad$$\$ 15,000$
Loss on the sale of equipment $\quad$ $( 29,000 )$
Gain on the sale of land used in the business $\quad$ 70,000
Loss on the sale of investment held five months $\quad$ (5,000)
Loss on the sale of investment held two years $\quad$$( 18,000 )$ The equipment sold at a gain originally cost $150,000, and $90,000 of depreciation had been claimed.What is Z Corporation's taxable income for 2012?

A) $618,000
B) $633,000
C) $647,000
D) $671,000
E) $685,000