How much does this cost to the nearest dollar?

Freewell Neutral Density ND4 Camera Lens Filter Compatible with Mavic 2 Zoom/Mavic 2 Enterprise Drone
High-end double side multicoated optical glass for premium image and video quality Extremely light in weight so no effect on gimbal Include ND4 cuts light by 2 f-stops Suitable for Cloudy Day's Compatible with Mavic 2 Zoom/Mavic 2 Enterprise Drone Dimensions 3.03 x 0.89 x 3.03 inches, Weight 1.12 ounces, model number Rank Camera Lens Neutral Density Filters 308, Camera Lens Filter Sets 456, Is Discontinued No, Available August 29, 2018, Manufacturer Freewell, Brand FREEWELL, Material Optical Glass, Photo Filter Thread Size 0.1 Millimeters,

Price is $20.00
Price: $19.99