How much does this cost to the nearest dollar?

Marinetech Safe T Alert Classic Propane/LP Gas Alarm - 12V, 30 Series Flush Mount, Brown
SAFE-T-ALERT 30 SERIES CLASSIC LP GAS DETECTORS - Features include Intel check Circuit eliminates false alarms caused from momentary exposure to LP Gas, aerosol cleaners, hair spray and other flammable gases. Long life, self cleaning sensor. Micro circuit technology saves precious battery power. 46 milli amp (.046 amp.) current draw. Meets RV standard ANSI A119.2 as required by the RVIA. Loud 85dB alarm alerts you to the presence of LP Gas and Natural Gas. Test/Reset button can be used to temporarily silence alarm during ventilation. Tests all detector functions with one touch. No dangerous gas required. Alarm is fully

Price is $53.00
Price: $53.16