Final answer:
U.S. retailers lose an estimated $60-$70 billion annually due to poor customer service, which significantly affects the sector's revenue.
Step-by-step explanation:
As of 2019, U.S. retailers lose approximately $60-$70 billion annually due to poor customer service. This significant financial impact highlights the importance of customer service in the retail sector. It underscores how negative customer experiences can translate into substantial revenue losses for businesses, far exceeding smaller figures such as $1.83 billion or $3.52 billion. It's also worthwhile noting that poor customer service can lead to losses that are a notable percentage of a segment's total revenue. For example, if a sector earns $1 trillion annually, a 4% loss due to poor customer service could mean around $40 billion lost, which aligns with the mentioned range of $60-$70 billion.