Identify what types of measurements will be useful for the following under the word "advertiser"

Exhibit TN - 2 Sideboard Sales profit per advertising campaign = (\# of impressions Windham received x click-through rates x percent who buy rate x average sale's profit margin) - advertising cost Sideboard Exhibit TN - 2 Sideboard Sales profit per advertising campaign = (\# of impressions Windham received x click-through rates x percent who buy rate x average sale's profit margin) - advertising cost Sideboard