Issue: the current quota plugin does not allow configuring currency values with more than two decimal places. For instance, I would like to configure $0.0125 for using 1 CPU of clock rate 100MHz and $0.00599 for the network usage (Bytes Sent).
Solution: modify column currency_value from table cloud_usage.quota_tariff to support values up to 5 decimal places. Values with more than 5 decimal places will be displayed with scientific notation in the user interface.
SQL command: "ALTER TABLE cloud_usage.quota_tariff MODIFY currency_value DECIMAL(15,5) not null"