(A) By what percent might you expect the average cost of goods and services to change over the second 6-month period of 2014? First, calculate the percentage cost change for the period July through December for each of the previous years: 2009 through 2013. Second, take the average of these five figures. This calculation gives us the average percent cost change. We often rely on multiple years for estimations to give us a more stable picture of percent cost changes.

(B) What is the estimated average salary for December 31, 2014?