How to make a bid in a reverse auction

As a supplier, when you enter in a reverse auction you have to be clear about the specifications of good(s) or "scope of work" of service(s) to be provided in case you win the auction. Most certainly, you have already discussed details with the buyer before the auction start, and if required, you also got detailed documentation via email from him(her).
In the auction window you will see specs and terms summarized, but the complete conditions and documents are the one you already received from buyer prior the auction start.

The field to place the bids is shown below, under section "Place a bid", and will be firm after click on "Ok" button.

Eventually, if you do mistakes, you can withdraw your offer with the button "Withdraw". This is however not available for the last 5 minutes of the bid. Don't wait until the last five(5) seconds of countdown to place your best offer, remember that internet connections have a delay of 3-4 seconds (and more depending on your connection speed).

In order to place your bid, click on "Ok" button.

How much time is remaining, for the auction to be close?
On the right frame you will see the auction countdown and the remaining time.