Stewart Export Co. had the following statement of cash flows for the year ended 03/31/15:

($ million)	Year ended 03/31/15
Net Income	1100
Depreciation	200
Loss on equipment sales	400
Change in Accounts Receivable	350
change In Stock	(200)
Change in Other Current Assets	100
change into accounts payable	(50)
change in other accounts payable	150
Net cash from operations	2050
capital expenditures	(1200)
Equipment sale	700
Net cash from investment	(500)

What was the book value of the equipment Stewart sold during the year ending 03/31/15?