The Savings is in the Conversion!!!
(11.75" x .018) = feet x .728 = lbs.
(15" x .016) = feet x .827 = lbs.
(15" x .018) = feet x .93 = lbs.
(13.75" x .016) = feet x .76 = lbs.
(18" x .016) = feet x .99 = lbs.
For Example: A home requires 300 feet of 5" K Style Gutter: