H$3$ Corp has pitched a project that produces portable helium tanks for small parties. The project requires an investment of $979$ dollars and will generate $253$ dollars for $10$ years. In the $10$th year, the project requires a clean up fee to wind down the project of $525$ dollars. What is the NPV of the project given a cost of capital of $8\mathrm{.}10\%.$ The answer is $470.$ I dont understand how they got the answer.