Display the Weekly Sales worksheet. Recall that the SUMIF function begins =sumif( and thenseparated by commasrequires a range, then a criteria cell, and then a sum range ending with the close parentheses symbol. In cell I2 enter a SUMIF function that looks at the range B2:B15 which has the defined name SHIFT for the criteria Morning in cell H2 and then sums the number of kid's size sold in the range C2:C15, which has the defined name KIDS Then copy the formula down through cell I4 to average the kid's sizes sold for each Shift