Answer:
The total cost of the manual including Tip is $78
Explanation:
The total bill amount at the restaurant = $65
The tip given = 20%
Now, 20% of 65 =

=

⇒ 20% of the bill amount $65 = $13
Hence, Total amount = Bill amount + Amount of Tip
= $65 + $13 = $78
So, the total cost of the manual including Tip is $78.