Standard_EC4es_v5 is an Azure VM size with 4 vCPUs. In Central US it costs $0.285 per hour on demand ($208.05 per month) for Linux. Spot capacity is about $0.0527 per hour. It is sold in 4 regions; the cheapest is East US 2 at $0.252 per hour.
Prices by region
USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.