Update README.rst

costs-plugin/README.rst

@@ -9,13 +9,14 @@ resource usage in a project.
 Costs are calculated from metrics obtained from Gnocchi and unit resource prices
 from the cloud usage database.
 
-The panel displays a table with the following columns:
+The panel displays a table summarizing the costs for resources consumed in a given period,
+providing for each resource, the following data:
     - Metric Name
     - Metric Description
     - Resource Name
     - Resource Type
-    - Average Value. Average resource consumption by hour.
+    - Average Use. Average resource consumption by the hour.
     - Unit. Unit of resource metric
     - Price. Unit price fetched from a separate price database.
-    - Cost. Final cost calculated based on the average value per hour and the
+    - Cost. Total cost for the period calculated based on the average use per hour and the
       corresponding price