I just need the steps taken to get to these answers,. I dont understand the process

Ross Co. purchased some equipment 3 years ago. The company's required rate of return is 7%, and the net present value of the project was $(3,179). Annual cost savings were: $10,375 each year for years 1-3. The amount of the initial investment was Selected Answer: [None Given] Correct Answer: 30,406 + 2 Ava Darling plans to buy a home and can deposit $1,221 per year for the next 5 years.. If the annual interest rate is 6%, how much can Ava Darling expect to have for a down payment in 3 years? Selected Answer: [None Given] Correct Answer: 3,887 +5 Ross Co. purchased some equipment 3 years ago. The company's required rate of return is 8%, and the net present value of the 3 project was $(3,614). Annual cost savings were: $52,564 each year for years 1-3. The amount of the initial investment was Selected Answer: $ 187,909.2712 Correct Answer: 139,077 +2