The total price including the discount and the tip is 

Solution:
Given:
Bill Amount = 

Coupon = 

So, Discount will be 

Discounted price = 

Mr. Oliver plans to give delivery driver a tip of 

Now, Bill (After reducing discount) = 
 
Tip = 

Tip Amount = 

Now add that tip amount,
Total Price = 

Steps to find the discounted price:
Step 1: Consider the rate of discount
Step 2: Find the actual discount by multiplying the discount rate by the original amount
Step 3: Subtract the actual discount from the original amount to find the discounted price.