Richbourg Inc.s Marketable Securities footnote had the following line items:

Marketable Securities at Dec 31, 2012		Amortized Cost		Fair Value
Total Trading Securities		$900		$1,000
Total Available-for-Sale Securities		$4,000		$3,500
Total Held-to-Maturity Securities		$1,000		$1,200
Total		$5,900		$5,700

What is the book value of Marketable Securities on Richbourgs Balance Sheet at December 31, 2012?

$6,100

$5,800

$5,900

$5,700

$5,500