The amount he gets for lunch is an illustration of mean and averages.
He gets for lunch is $240 daily
Represent the amount he gets for lunch each day be x.
So, the amount saved each day is x/2
From Monday to Friday, the total savings would be 5x/2
So, we have:

Multiply both sides by 2

Divide both sides by 5

Hence, the amount he gets for lunch is $240 daily
Read more about mean and averages at:
brainly.com/question/16217700