c7gn.xlarge is an AWS EC2 instance with 4 vCPUs, 8 GiB memory (AWS Graviton3 Processor). In US East (N. Virginia) it costs $0.2496 per hour on demand ($182.21 per month) for Linux; a 1-year reserved instance with no upfront costs $0.1572 per hour, 37% less. Spot capacity is about $0.0913 per hour. It is sold in 6 regions.
Prices by region
USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.