Problem: A French software genius had been offered 20,000 per year for the next four years and then 30,000 per year for the following 15 years for the rights to his new smart phone app. At 5% interest, how much is this offer worth today?

Problem: A French software genius had been offered 20,000 per year for the next four years and then 30,000 per year for the following 15 years for the rights to his new smart phone app. At 5% interest, how much is this offer worth today