Answer:
Therefore, $28.20 is added as gratuity to the $141 bill for a party of 6.
Explanation:
If a party has 6 or more people, a 20% gratuity is automatically charged. So in this case, the gratuity is:
20% of $141 = (20/100) x $141 = $28.20
Therefore, $28.20 is added as gratuity to the $141 bill for a party of 6.