Impressions
For every 100.000 digital impressions, InBrowser ordered the advertiser gets 7% of impressions for free. In this case, it means that she gets 7000 impressions for free.
The unit count shows now that the customer has bought 240K impressions for total revenue of 13200 €. This earns him 7% * 240000 = 16800 impressions.
A progressive calculation would only allow full batched of 100000 AI and show a total of 14000 earned units.
The total revenue applied is for both cases zero, as the rebate in kind gives away units for free.