How much does this cost to the nearest dollar?

AmScope 7X-90X Simul-Focal Stereo Lockable Zoom Microscope on Dual Arm Boom Stand
The is a heavy-duty, highly-flexible microscope designed for biological and industrial applications.This model is especially popular in the QC, repair and engraving industries thanks to its ease-of-use and reliability. This model features a zoom-lock to maintain consistent magnification when needed, and uses focusable eyepieces rather than integrated dioptric adjusters. With its wide zoom range and double-arm boom-stand, this model will become an indispensable instrument in any workshop or lab. The trinocular photo-port is simul-focal, so it can be used simultaneously with both eyepieces. Ocular Adjustment The ocular tubes are not equipped with dioptric adjusters,

Price is $522.00
Price: $521.99