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.
A variable cost usually varies depending on the amount of the sale. A commissioned salesperson, for example, is a variable cost. If the rep is paid 10 percent of sales, and the sales for a given month are $25,000, then that person gets $2,500 in commissions. If sales drop to $1,000, then the commission drops to $100.