Support for the $format Query Option. The OData protocol supports both JavaScript Notation (JSON) and Atom feeds, and OData provides the $format system query option to allow a client to request the format of the response feed. This system query option, if supported by the data service, must override the value of the Accept header of the request. WCF Data Services supports returning both JSON and Atom feeds. However, the default implementation does not support the $format query option and uses only the value of the Accept header to determine the format of the response.
1 According to RD.com, the average safe room costs $2,000 to $5,000 to build. 2  FEMA.gov claims that the average safe room can cost anywhere from $6,600 to as much as $14,300.3  The size of the safe room will be the largest determining factor in the price. If you need to have a safe room installed by the professionals, consider getting multiple quotes from contractors in your area on websites like HomeAdvisor.com. 2  For example, a 8-by-8-foot room can cost $9,000, while a 14-by-14-foot room can cost around $15,000.
Adding a family room can cost $75-$250 a square foot, or $30,000-$100,000 for a 16'x25' room, depending on complexity, materials and local labor rates. A bedroom addition consisting of 500 square feet of new floor space with two bedrooms and a bathroom can cost $50-$250 or more a square foot, or $25,000-$125,000.