You are an analyst for an art dealer who sells works by James C. Christensen. You are asked to analyze sales data from 2010-2012 and 2004-2006 to help discuss value trends with customers. This involves sorting the Subtotals worksheet, using subtotals to find highest prices by type, creating a pivot table on the PivotTable worksheet to calculate averages and percentage changes, and making a clustered bar pivot chart on the PivotChart worksheet to compare issue prices and estimated values for sold out works from 2005-2007. The worksheets and analyses are formatted and ordered as specified.