Which of the following metrics is NOT typically used to measure sustainability in coffee sourcing?

Measuring sustainability in coffee sourcing involves a comprehensive look at various factors that contribute to both the social welfare of farmers and the environmental health of growing regions. Metrics such as farmer livelihoods and environmental impacts offer insights into how practices affect the communities and ecosystems involved in coffee production.

Farmer livelihoods assess economic stability and welfare of the farmers, while environmental impacts evaluate how coffee cultivation influences biodiversity, soil health, and climate. Sustainability metrics are broader, encompassing various aspects of responsible practices across the supply chain.

Retail price fluctuations, however, don't inherently measure sustainability. They reflect market dynamics and consumer preferences rather than the effectiveness or responsibility of sourcing practices. Tracking retail prices provides valuable information for market analysis but does not directly relate to ethical sourcing or sustainable development within coffee production. Thus, it stands apart as a metric that is not typically used to gauge sustainability in coffee sourcing.