Your total restaurant bill for food and drinks is $63.57. What is a good estimated cost for just the food and drinks

The total restaurant bill for food and drinks is = $63.57

This total bill consists of the prices of the items purchased, and the tip given to the waiter. So, the total bill of only food will contain only the food prices. So, it will be less than $63.57

Now, as it is not mentioned how much tip was given, lets assume that the tip is 10% which is $ 6.357

So, lets subtract it from the total bill. Its $ 57.22. Hence a good estimation is a reduced bill than the given amount of $63.57