The RC and More Superstore decides to track customer complaints as part of their ongoing customer satisfaction improvement program. After collecting data for two months, their check sheet appears as follows: 
If they construct a Pareto chart, what is the cumulative percentage of the two left most bars?
Definitions:
Stressful Life Events
Occurrences that significantly alter an individual's life, requiring substantial adjustment and potentially leading to psychological strain.
Life Challenges
Pertains to the obstacles, difficulties, or hardships that a person encounters throughout their life which require adaptation, resolution, or management.
Empty Nest Syndrome
A feeling of loneliness or sadness that occurs among parents after their children have grown up and left home.
Workforce Participation
The proportion of working-age individuals who are employed or actively seeking employment.
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