I couldn't find the 2400 number, but found a higher one from another CNN article, which reported that Musk stated in a letter to DoD that his 'most advanced models he send to Ukraine cost up to $4500 a month.' Actually he charge more for regular customers for that service: Starlink Maritime - High-speed, low-latency internet with up to 350 Mbps download while at sea. $5,000/mo with a one-time hardware cost of $10,000.