Please, I also need to see the hand calculation details to know how to do it. Thanks

Problem 3-10 (Algo) The Tuff Wheels was getting ready to start its development project for a new product to be added to its small motorized vehicle line for children. The new product is called the Kiddy Dozer. It will look like a miniature bulldozer, complete with caterpillar tracks and a blade. Tuff Wheels has forecasted the demand and the cost to develop and produce the new Kiddy Dozer. The following table contains the relevant information for this project. Development cost Estimated development tine Pilot testing Ramp-up cost Marketing and support cost Sales and production volume Unit production cost Unit price Interest rate $750,000 9 months $200,000 $400,000 $150,000 per year 60,000 per year 100 $ 155 Tuff Wheels also has provided the project plan shown as follows. As can be seen in the project plan, the company thinks that the product life will be three years until a new product must be created. YARI YEAR 2 YEARS YEAR 999999999999999 Protect SD KDO DO Deslorent Pilot Testing Pamo Marketing and Support Production and Assume all cash flows occur at the end of each period. Assume all cash flows occur at the end of each period. a. What is the net present value (discounted at 8%) of this project? Consider all costs and expected revenues. (Enter your answer in thousands of dollars. Perform all calculations using Excel. Do not round any intermediate calculations. Round your answer to the nearest thousand.) Not present value b. What is the impact on NPV for the kiddy Dozer if the actual sales are 50,000 per year? 70,000 per year? (Enter your answer in thousands of dollars. Perform all calculations using Excel. Do not round any intermediate calculations. Round your answer to the nearest thousand.) NPV 50.000 NPV 70.000 W b. What is the impact on NPV for the Kiddy Dozer if the actual sales are 50.000 per year? 70.000 per year? (Enter your answer in thousands of dollars. Perform all calculations using Excel. Do not round any intermediate calculations. Round your answer to the nearest thousand.) NPV 50.000 NPV 70,000 c. Based on the original sales level of 60,000, what is the effect on NPV caused by changing the discount rate to 9% 10%, or 113? (Enter your answer in thousands of dollars. Perform all calculations using Excel. Do not round any intermediate calculations. Round your answer to the nearest thousand.) NAVOS NPV 10% NPV 11%