How much does this cost to the nearest dollar?

APEC Top Tier Supreme Boosted Performance with Permeate Pump Ultra Safe Reverse Osmosis Drinking Water Filter System for Low Pressure Homes (ULTIMATE RO-PERM)
APEC's high-efficiency RO-PERM permeate pump RO system is specially designed for low pressure areas (30- 50 psi), like in some well water homes, where a standard RO system would not function or would be very slow. This breakthrough performance-upgrade system fills water tanks 2-3 times faster and conserves water up to 80% more than standard systems. No electricity is needed, as the permeate pump is powered by hydraulic energy normally lost to the drain. giving you the purest water possible. of all contaminants, such as chlorine, taste, odor, toxic fluoride, arsenic, lead

Price is $400.00

Price: $399.99