How much does this cost to the nearest dollar?

Portable Ammonia Gas Detector LCD Backlight Rechargeable Li-Battery Powered Sensitive Alarm Digital NH3 Gas Concentration Monitor Tester Meter
PRODUCT SPECIFICATIONS Gas Measurement Type Ammonia gas( NH3 ) Measuring range Resolution 0.1PPM Basic error 0.5PPM Response time Less than 120 seconds Recovery time Less than 120 seconds Repeatability Less than ± 1% Measuring Principle Electrochemical principle, life for 2 years Low / High Alarm Yes Alarm Setting yes Alarm Acoustic, optical double alarm, can set the alarm value, an alarm sound is up to 80dB Working Temperature -20~ 50℃ Working Humidity <95%RH (Non Gel) Storage Temperature 0~40℃ Power Supply 3.7

Price is $296.00

Price: $296.16