Calculate the percentage change in sales revenue for each of the most recent four quarters relative to the same quarter one year earlier? Describe the pattern you observe? Compute Gross Margin \% for the most recent four quarters: \begin{tabular}{l|l} 1st quarter (ending 9/20 ) & \\ 2nd quarter & Gross Margin \% =SalestSalestCostofGoodsSoldt \\ (ending 12/20 ) & \\ 3rd quarter \\ (ending 3/21 ) \\ 4th quarter \\ (ending 6/21 ) & \end{tabular} Describe the pattern you observe