Hi Leonardo,
There is a out of the box report "Bid Summary Report" for each event. This can be accessed from Report tab of each event.
You can get the following information.
Number Invited
Number Accepted
Number Declined
Number of Bidders/Respondents
Number Awarded
Incumbents Invited
Incumbents Accepted
Incumbents Declined
Number of Incumbent Bidders/Respondents
Incumbents Awarded
Total Responses
Average Number of Responses per Participant
Average Number of Responses per Incumbent
Total Surrogate Responses
Total Responses Removed
And the entire line item details
Neel