Why do salaries for the same work differ throughout a country and in other countries?

Adupont analysis is conducted using the dupont equation which to identify

Identify an organization with the low-total-cost value proposition and suggest at least two possible measures within each of the four balanced scorecard perspectives.

Boone brothers remodels homes and replaces windows. ace builders constructs new homes. if boone brothers considers expanding into new home construction, it should evaluate the expansion project using which one of the following as the required return for the project?