<u>Option B</u>
<u>ANSWER:
</u>
The final cost after rounding to nearest penny is $ 28.77, so second option is correct.
<u>SOLUTION:
</u>
Given, a customer's check subtotal comes to $27.14,
And a tax of 6% needs to be added,
We have to find what would be the final total?
Now, final cost = subtotal + tax
Final cost = subtotal + 6% of subtotal

Hence, the final cost after rounding to nearest penny is $ 28.77, so second option is correct.