Millerstown, on the Nolin River, was the first community to be formally incorporated in 1826; Falls of Rough grew up around the Green Sawmill, which first operated in 1823; and Grayson Springs, a popular summer resort, opened in 1830 and peaked in prosperity about 1900.
Example 1. Assume a business produces clothing. A variable cost of this product would be the direct material, i.e., cloth, and the direct labor. If it takes one laborer 6 yards of cloth and 8 hours to make a shirt, then the cost of labor and cloth increases if two shirts are produced.
Fixed costs often include rent, buildings, machinery, etc. Variable costs are costs that vary with output. Generally variable costs increase at a constant rate relative to labor and capital. Variable costs may include wages, utilities, materials used in production, etc. In accounting they also often refer to mixed costs. These are simply costs that are part fixed and part variable.