Final answer:
Before confirming Jackie's cake order, check the bakery's schedule and ingredient availability. Confirm with Jackie and mark the calendar to track and follow up on the order.
Step-by-step explanation:
Before confirming Jackie's order for a full sheet mocha cake to be ready on Saturday, you should check the bakery's schedule to ensure that there is enough time to prepare and decorate the cake. You should also verify the availability of all necessary ingredients and equipment. If everything is in order, you can confirm with Jackie and mark your calendar to track the progress of her order. Remember to follow up with Jackie a day before the pickup to confirm that her order is on track.