Several studies have demonstrated that taller men usually earn higher salaries than equally qualified men of shorter heights. Homotrope growth hormone can increase a child's height at a cost of $40, 000 per inch. Clyde's parents wanted him to be 3 inches taller than he was projected to be. They paid for the treatments for 4 years (at a cost of $40, 000 per year) beginning on their son's 10th birthday. How much extra money would Clyde have to earn per year from his 26th through 60th birthdays in order to justify their expenditure at an interest rate of 10% per year? (Draw the cash flow diagram and use standard notation)