An online retailer creates a case type that processes and manages customer orders. The checkout process has four steps:
Review Order: The customer reviews the items in order of add-to-cart selection and can adjust the quantity of each item and delete items to calculate and display the order total.
Select Shipping Option: The customer selects a shipping option to determine and display the shipping charge for their order.
Enter Delivery Address: The customer enters their delivery address to determine the sales tax, if applicable, and the application displays the calculated sales tax.
Enter Payment Information: The customer selects a payment option and confirms the grand total of the order.
For each calculation, identify the appropriate chaining option to maximize the performance.