Answer: Accounting profit= $44,500
Economic Profit = $4,150
Explanation: <em>Accounting profit</em> are the profit earned by subtracting explicit cost from the total revenue earned.

<em>Economic profit</em> are profits lefts out after subtracting implicit (opportunity) cost and explicit ( monetary) costs. It is given by

In this case, the explicit cost include rental cost, office supplies, office staff and telephone expenses.
While, implicit cost include the 7% interest foregone on the $5000 savings and the salary foregone ($40,000) by choosing to startup a business than take up the job.
I think it's called a price ceiling. At least, that's what I think it is.
Answer:
The AC Corporation takes 46 Days average to pay back its accounts payable.
Explanation:
Average Accounts Payable = $7863.5
Cost of Goods Sold = $63,008
Number of Days in Accounting Period = 365
Days Payable Outstanding = (Average Accounts Payable / Cost of Goods Sold) x Number of Days in Accounting Period
Days Payable Outstanding = ($7,863.5 / $63,008) x 365
Days Payable Outstanding = 45.55
Therefor, the company takes an average of 46 days to pay back its accounts payable.