Problem
Mori is planning to retire in 40 years and would like to plan for his retirement by depositing $2000 in a saving account at the local bank, earning him 3% per year compounded annually. He thinks his new job will allow him to deposit $500 at the end of the first year, and he plans to keep increasing the deposited amount by $20 every year. How much will he have collected for his retirement at the end of the 40th year?