Final answer:
More information is needed to determine by what time the slicing should be completed.
Step-by-step explanation:
In order to determine by what time you should have completed slicing the Fresh Slice Cheese of the Week, we need more information. The question does not provide any time frame or rate at which the slicing is being done. Without this information, it is impossible to calculate the time it would take to complete the task. Can you please provide more details?