c9g.large is an AWS EC2 instance with 2 vCPUs, 4 GiB memory (AWS Graviton5 Processor). In US East (N. Virginia) it costs $0.0869 per hour on demand ($63.44 per month) for Linux. Spot capacity is about $0.023 per hour. It is sold in 8 regions; the cheapest is Asia Pacific (Malaysia) at $0.0849 per hour.
Prices by region
USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.