Starbucks Coffee classifies its customers into two types unsatisfied or satisfied.

The behavior of these customers can be summarized as follows:

Behavioral Metric	Unsatisfied Customer	Satisfied Customer
Number of visits per month	2.7	4.3
Average ticket size/visit	$3.88	$5.06
Expected customer life (years)	2.2	5.5

For which customer type will Starbucks see the least decrease in expected customer life from a 1% drop in retention rate? Show work.