Cart Shopping Cart My Store Account Orders Downloads Shopping Cart Remove item Thumbnail image Product Price Quantity Subtotal × 3. Aircraft Accessories - A Weighty Problem $20.00 3. Aircraft Accessories - A Weighty Problem quantity $20.00 × 366. Extended Usage of Statistics in the Weight Problem Areas $20.00 366. Extended Usage of Statistics in the Weight Problem Areas quantity $20.00 × 417. Cargo Densities $20.00 417. Cargo Densities 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