In order to clearly understand the process swatch-billable-usage goes through to determine what to send to the marketplaces we need to document the operations that take place. We should make clear what units(metric-no billing factor vs billable-with billing factor) each component is using and what to expect in cases when rounding needs to occur.

This should include:

• Contract lookup
• Total Remitted lookup
• UsageCurrentTotal (how we use the tally total)
• What gets saved in billable_usage_remittance table
• What gets sent to the billable_usage topic