Final answer:
The total cost of two placements can be calculated by summing the costs of each placement. The total revenue can be calculated by summing the revenues generated from each placement. The return on ad spend (ROAS) can be calculated by dividing the total revenue by the total cost and multiplying by 100 to get a percentage.
Step-by-step explanation:
The total cost of two placements can be calculated by summing the costs of each placement. For example, if placement A costs $100 and placement B costs $150, then the total cost would be $100 + $150 = $250.
The total revenue can be calculated by summing the revenues generated from each placement. If placement A generates $200 in revenue and placement B generates $300, then the total revenue would be $200 + $300 = $500.
The return on ad spend (ROAS) can be calculated by dividing the total revenue by the total cost and multiplying by 100 to get a percentage. So, if the total revenue is $500 and the total cost is $250, then the ROAS would be ($500 / $250) * 100 = 200%.
The total clickthrough rate (CTR) can be calculated by summing the clickthrough rates of each placement and dividing by the number of placements. It is usually expressed as a percentage. For example, if placement A has a CTR of 2% and placement B has a CTR of 3%, then the total CTR would be (2% + 3%) / 2 = 2.5%.
To determine which placement is more effective in terms of ROAS, compare the ROAS values of both placements. The placement with the higher ROAS is considered more effective. In the given example, if placement A has a ROAS of 150% and placement B has a ROAS of 200%, then placement B is more effective.