Answer: $538,806.50
Step-by-step explanation:
This question is a compound interest question. If the savings increased at 14% per year then the amount when he is 68 will be;
Future Value = Present Value * ( 1 + Interest Rate ) ^ Years
Years = 68 - 20
= 48
Future Value = 1,000 ( 1 + 14%) ^ 48
= 1,000 * 538.8065
= $538,806.50