Tomoko has created a table for the sale of sweatshirts in her shop last month with the headings, Customer's Name, Sweatshirt Size, Order ID and Payment Date. She wants to sort the number of sweatshirts of each size $-$Small, Medium, Large and Extra Large, bought by different customers. To do so$,$ she can first sort her worksheet by sweatshirt size from smallest to largest, then click Subtotal command under the Data tab. Tomoko can then click the drop$-$down arrow for the At each change in field and select 'Sweatshirt Size', then select COUNT to count the number of sweatshirts ordered in each size. Then she can select 'Sweatshirt Size' in the Add subtotal to field and finally click OK$.$