How much does this cost to the nearest dollar?

Car Battery Charger, 12V 6A Smart Battery Trickle Charger Automotive 12V Battery Maintainer Desulfator with Temperature Compensation for Car Truck Motorcycle Lawn Mower Marine Lead Acid Batteries
QUICK BATTERY CHARGER 12 volt 6-Amp quick car battery charger, can charge or repair all and lead-acid automotive, marine and deep-cycle batteries including AGM, GEL, SLA, Flooded in cars, trucks, SUVs, motorcycles, lawn mowers, boats, etc. 8 CHARGING PROTECTION Smart control, temp compensation in hot climates and under-charging in cold climates, reverse protection, cooling system, overcurrent, fireproof material, overvoltage, short circuit. Trickle charger with multiple protection ensure the safety charging at anytime

Price is $21.00
Price: $20.68