Using the Simple Monthly Calculator, looking at the Large Web Application in Tokyo.The Simple Monthly Calculator can be used to estimate the cost of running applications in the cloud. The tool provides a high-level estimate of the cost of using AWS services based on a few basic parameters that you provide. Looking at the Large Web Application in Tokyo on the Simple Monthly Calculator, there are different components that make up the large web application in Tokyo.The Simple Monthly Calculator example diagram for the Large Web Application in Tokyo has the following services, each with an estimated monthly cost:2 EC2 instances with 2 vCPUs and 4GB of memory, estimated at $72.60 per instance. Total cost = $145.20.3 RDS instances (MySQL) with 100GB of storage each, estimated at $175.71 per instance. Total cost = $527.13.1 Elastic Load Balancer (ELB) with 15GB of data processing, estimated at $15.00 per month. The total cost for all the services in the example diagram for the Large Web Application in Tokyo is $687.33. Therefore, the number of EC2 instances deployed in the example diagram and estimate for the Large Web Application in Tokyo is 2 EC2 instances.Using the Simple Monthly Calculator, looking at the service components of the Free Website on AWS in Northern VirginiaThe Simple Monthly Calculator is used to estimate the cost of running applications in the cloud. When looking at the service components of the Free Website on AWS in Northern Virginia on the Simple Monthly Calculator, two of the highest-priced services are:Amazon RDS (Relational Database Service): It is a web service that makes it easier to set up, operate, and scale a relational database in the cloud. The cost of Amazon RDS is based on the size of the database instance and the amount of storage used per month. For the Free Website on AWS in Northern Virginia, the estimated cost for the Amazon RDS service is $124.90 per month.Amazon EC2 (Elastic Compute Cloud): It is a web service that provides resizable compute capacity in the cloud. EC2 instances can be launched and terminated as needed, and users are only charged for the instances that they use. The cost of Amazon EC2 is based on the type of instance used, the number of instances used, and the amount of time that the instances are used. For the Free Website on AWS in Northern Virginia, the estimated cost for the Amazon EC2 service is $72.60 per month.