The most amount that should be consumed in his youth is $15,254.23.
The calculation is as follows:
Present value × 1.18 = Future value
Present value × 1.18 = ($15,000 + $3,000)
So, the present value should be
= $18,000 ÷ $1.18
= $15,254.23
The present value is the value that represents today's value.
Therefore we can conclude that the most amount that should be consumed in his youth is $15,254.23.
Learn more about the present value here: brainly.com/question/11429476