Answer:
B. $14352.08
Explanation:
Let us find cost of item after 7.2% of sales tax. The cost of item after 7.2% of sales tax will be equal to 15640 plus 7.2% of 15640.

Therefore the cost of item after 7.2% of sales tax will be $16766.08.
Now let us add registration fee to the cost of item.

Now let us subtract $2500 trade allowance to find the total cost of the item.
Therefore, the total cost of item will be $14352.08 and option B is the correct choice.