Final answer:
It will take approximately 11 hours and 30 minutes to complete all the sales reports and the inventory document.
Step-by-step explanation:
To calculate the total time required, we need to add the time for completing all the sales reports with the time for completing the inventory document.
Since each sales report takes 45 minutes to complete and there are 12 sales reports, the total time for completing the sales reports would be 45 minutes * 12 = 540 minutes.
The inventory document takes 2 hours 30 minutes to complete, which is equivalent to 2 hours * 60 minutes + 30 minutes = 150 minutes.
So, the total time required to complete all the reports and the inventory document would be 540 minutes (sales reports) + 150 minutes (inventory document) = 690 minutes.
To convert to hours and minutes, divide 690 minutes by 60 to get 11 hours (with 30 minutes remaining).
Therefore, the answer is C. 11 hours 30 minutes.