On the Archera Segment Explorer, we break out cost information as reported by the AWS APIs. Confusingly, these APIs collect a number disparate, ancillary usage charges from EC2 into a category called "EC2-Other", which for some workloads can be large.
Under the "EC2-Other" umbrella the following costs are combined:
Essentially, these are the usage costs commonly associated with EC2 usage such as snapshots, CPU Credits, Data Transfer fees, etc.
To get further details on these individual costs, you can use the Segment Explorer "Group By" functionality. Select "Group By" and change to "Usage Type":
Next, select the services you want to collect information on. For example, here we are looking at all the DataTransfer costs: