For one 5-year period, the state of Alabama paid $⁢105.5 million in Medicaid expenses for children 3–6 years old. A study indicates that if 10% of this population increased the use of fluoride, the state could save an additional $⁢3.9 million over the next 5 years, and if 30% of this population increased the use of fluoride, the state could save an additional $⁢18.6 million. Determine which calculation for finding the average percent change each step applies to. Select the correct answer in each row.