Question: Why is it often difficult to estimate the financial returns from promotional expenditures? O It is too difficult to calculate GRPs. O It's impossible to
Why is it often difficult to estimate the financial returns from promotional expenditures? O It is too difficult to calculate GRPs. O It's impossible to accurately measure cost per thousand (CPM). O Promotions often have a cumulative effect that's difficult to measure at a given point in time. O Frequency objectives often go unmet
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