please post with work and use the compound interest factor tables, not excel

Problem 03.043- Shifted gradients A software company that instails systems for inventory control using RFD technology spent $680,000 per year for the past 3 years in developing their latest product. The company optimistically hopes to recover its investment in 5 years on a single contract beginning immediately (year 0 ). The company is negotiating a contract that will pay $255,000 now and a to-be-agreed-upon annual increase of a constant amount each year through year 5 . How much must the income increase (an arithmetic gradient) each year if the company wants to realize a retum of 1500% per year? (Round the final answer to three decimal places)