How much does this cost to the nearest dollar?

Sigma 1.4X Teleconverter for Nikon F Bundle with Carry Case, Flexible Tripod, and 6Ave Cleaning Kit
Optimized for Nikon F-mount lenses in the Global Vision line, the 1.4x Teleconverter from Sigma will offer an increase in focal length of 1.4 times for select Global Vision lenses. This model offers full communication between the lens and camera and will allows autofocus to operate at up to f/8. The teleconverter also features one Special Low Dispersion element for reducing the appearance of chromatic aberrations and maintaining quality. Additionally, for protection, the is both dust and splashproof. When attached, the 1.4x conversion results in a light loss of approximately one stop. A soft zippered carrying case is included to protect

Price is $309.00
Price: $308.99