How much does this cost to the nearest dollar?

Kenwood Excelon Mono Digital Power Amplifier
Kenwood's Excelon Reference Series mono amplifier can power your subwoofer with up to 1,000 watts RMS. (That's a real world rating, not that inflated number you find printed on some amps.) An advanced circuit design and upgraded components virtually eliminate noise and maximize sound quality. Even better, the can fit into many different places in your car because of its incredibly low profile — it's only 2 tall. Features - Class D Dual Σdrive Speaker Level Input Signal Sensing Turn-on Terminal Cover Cooling Fan Power MOS-FET Switching Power Supply Extruded Aluminum Heat Sink Design Line Output Terminals for Extension Specifications - Signal to Noise Ratio 100dB (Reference Rated Power into 4Ohms at 14.4V)

Price is $579.00

Price: $579