How much does this cost to the nearest dollar?

Blue 211+ Replacement Filter Compatible with Blueair Blue Pure 211+ Air Puri-fier, Foldable Activated Carbon Filter, 1 Pack
Blue Pure 211+ Replacement Filter Compatible with Blueair Blue Pure 211+ Air Cleaner Purifier, Fit for Blue Pure 211+ Only(Please carefully check the model number) Folding granular activated carbon filters Active carbon filters absorb pets, cook, and home smell. The 211+ real HEPA filter can capture 99.97 % of the air particles, as low as 0.3 microns. Blue Pure 211+ Filter details double layer filtration, front filter absorbs pet plush and life debris. Carbon filter captures volatile organic compounds, smoke components. 

Price is $37.00

Price: $36.98