Cart Shopping Cart My Store Account Orders Downloads Shopping Cart Remove item Thumbnail image Product Price Quantity Subtotal × 42. Titanium - A Future Aircraft Structural Material $20.00 42. Titanium - A Future Aircraft Structural Material quantity $20.00 × 68. Weight Growth of Experimental Jet Fighter Airplanes $20.00 68. Weight Growth of Experimental Jet Fighter Airplanes quantity $20.00 × 5. Relationship of Identification Numbers to Weight and Cost Control $20.00 5. Relationship of Identification Numbers to Weight and Cost Control quantity $20.00 Coupon: Apply coupon Update cart Available coupons (Click to apply). Cart totals Subtotal $60.00 Tax $0.00 Total $60.00 Proceed to checkout