cost_type of the service. A billable service has one of the following cost types: {service_count} * {rate}{request_count} * {rate}billing_unit and total byte count not soft-deleted up to the billing period end. Amount = {unit_usage} * {rate}. For example, if billing_unit is gb, then unit_usage = total_bytes / (1024 * 3)billing_unit for each billable service. Supported units: gb - with per_usage cost type. Conversion = totalByteCount / (1024 * 1024 * 1024)request - with per_request cost type. 1:1 record to request ratioresource - with per_entity cost type. 1:1 record to entity ratiocost_type and billing_unit. All amounts are in USD.