How much does this cost to the nearest dollar?

Work with Alexa ANNKE 5MP NVR Wi-Fi Security Camera System with 10.1 LCD Monitor, 4CH 5MP WiFi Surveillance NVR with 4Pcs 1296p Outdoor IP Cameras, 100ft Night Vision, 1TB Hard
Expandable 5MP WiFi NVR & Stunning 2K Cameras ANNKE 5MP wireless NVR supports up to 4 WiFi cameras simultaneously for up to 5MP live stream, recording & playback. Get non-stop video surveillance by inserting an up to 4 TB HDD (1TB pre-installed) into the NVR without overwriting. It works perfectly with 3MP WiFi IP cameras; they together presents true super HD crystal-clear images about 1.5 times clearer than 1080

Price is $310.00
Price: $309.99