which function would i use for this and how is it used? thankyou

3.1.1 Perform logical operations by using nested functions including the IF0, IFSO, SWTCHO, SUMIFO, AVERAGEIFO, COUNTIF0, SUMIFSO, AVERAGEIFSO, COUNTIFSO, MAXIFSO, MINIFSO, AND0, ORO,NOTO, and LETO functions On the Sales Report worksheet, add a function in C7:C19 that retums the number of sales in the Sales worksheet for the products listed in B7:B19. 2.2.4 Calculate data by inserting subtotals and totals On the Sales Report worksheet, use Subtotals to create Totals and Averages for the I. values in the Number of Sales column