Kite 'N String manufactures old-fashioned diagonal and box kites from high-strength paper and wood. Each diagonal kite, which nets the company a $3 profit, requires 8 square feet of paper and 5 linear feet of wood (including waste). Box kites net a $5 profit and, including waste, require 6 square feet of paper and 10 linear feet of wood. Each is packaged in similar boxes. This week Kite 'N String has 1500 boxes and capacity to tailor 10,000 square feet of paper and 12,000 linear feet of wood for kite production. What is the shadow price for an extra wood?
$0.44
$0.40
$0.10
$500