How much does this cost to the nearest dollar?

Replacement MERV 11 Filter for Trane - 21 X 27 X 5, 2-Pack
Aftermarket replacement for popular Trane/American Standard filter. Interchangeable with / Dimensionally identical. 21 X 27 X 5 nominal size ( 20.7 x 26.2 x 5 actual size ). Rated MERV 11. Note - this filter is not manufactured by Trane or American Standard. Many of our customers have come to us looking for alternatives to the expensive OEM PerfectFit filters. Because of unusual sizing and filter construction methods, substitutes have not been available.... until now! These filters are made by a leading manufacturer to the same dimensions and performance specifications as the factory filters. Buy today and save! - 21 X 

Price is $84.00
Price: $83.91