Create a PivotTable to examine which product sales are seasonal.

Create a PivotTable on the ProductSalesByDate worksheet to answer the question, "Which of the products have sales that are seasonal?"

Show total product sales by date for each product.

Expand year to quarter and quarter to month to show sales by year, quarter, and month.

Remove the display of the Year Subtotals from the PivotTable.

Create a Line PivotChart from the PivotTable report to see the change in values over time.

Click on the collapse entire field button and then the expand button to see how the PivotChart changes. $+/-$ buttons in the bottom right corner of the chart.

Sort the table by years from the newest to the oldest.

Add conditional formatting $($data bars$)$