start on user/organization usage summary via /api/me
refactor usage_summary(), delineating ondemand vs overage cost+hours
add transcripts.retail_cost_per_min and monthly_usages.retail_cost
add monthly_usages.retail_cost
add retail_cost to superadmin
move wholesale/retail constants to Transcript class, consider [retail]cost == 0 if the cost_type is wholesale (i.e. included in plan)
fix new cost column alignment
give storage_configuration a to_s method for activeadmin to stringify with
organization does not have a pop_up_hours shortcut method
fix class names
clarify more wholesale-vs-retail in superadmin