$20.$ Insert a blank row between the detailed section and the Summary section. Change the text in cell A$22$ to bold, $16$ pt font.

$21.$ Format row $23$ with the same settings as those in row $4.$

$22.$ Use the data in the range B$6$:F$17$ to calculate the Seats in Section, Seats Sold, Seats Not Sold, and Gross Revenue amounts in the Summary section. Sum these amounts in row $27.$

$23.$ Insert a formula in cell E$27$ to calculate the average percentage of seats sold that day.

$24.$ Align Centre the range B$24$:D$27.$ Display the values in range E$24$:E$27$ as percentages with one decimal and right indent these values twice. Display the values in range F$24$:F$27$ as currency with zero decimals.

$25.$ Underline the values in range B$26$:F$26$ and apply bold format to the total line. Extend the Outside Border to the entire Summary table.