Manufacturing overhead consists of only indirect product costs. Some companies even refer to it as indirect overhead.. Others call manufacturing overhead by the label, factory overhead. Indirect costs cannot be easily traced to specific products or services provided. Because period costs have no relationship with products, they are never labeled as direct or indirect.
The United States averaged 1,274 tornadoes per year in the last decade. April 2011 saw the most tornadoes ever recorded for any month in the US National Weather Service's history, 875; the previous record was 542 in one month.
The number of blizzards each year has doubled in the past two decades, according to preliminary research by geographer Jill Coleman at Ball State University in Muncie, Ind. 1  From 1960-94, the United States averaged about nine blizzards per year. But since 1995, the average is 19 blizzards a year, she said. The increase could stem from better reporting and monitoring of the storms, among other theories, Coleman said. Overall since 1960, more than 700 blizzards have occurred in the U.S., excluding Alaska and Hawaii.