How much does this cost to the nearest dollar?

RYRA WiFi Natural Gas Detector,Smart WiFi Gas Leak Detector with Temperature Sensor LCD Display, Plug-in Gas Leak Sensor for LPG, LNG,Methane & Butane Gases
Description Specifications Specification Power supply：Micro Detecting gas：Natural LPG Working Environment Temperature Sample： Diffusion LEL Alarm setting LEL LEL Response time：≤ 30 seconds Heat alarm Alarm Valve/manipulator drive output for 15 seconds Warm-up seconds Sensor life：5 years Dimensions Package Included 1*Gas detector 1*USB cable plug 1*User Manual ✦ High Precision ：The has an LCD screen that displays precise, real-time gas readings so that you know the exact gas concentration in the air of your home at all times. ✦ Detectable Gas ：The natural gas leak detector

Price is $32.00

Price: $31.99