Having issues with the NPV, I know that equation is 1/(1+r)^n but I keep getting 0.51 and that is not the answer.

LISEN VOIN Creole Restaurant is considering the purchase of a $9,700 souffl maker. The souffl maker has an economic life of four years and will be fully depreciated by the straight-line method. The machine will produce 1,850 souffls per year, with each costing $2.10 to make and priced at $5.10. Assume that the discount rate is 15 percent and the tax rate is 34 percent. What is the NPV of the project? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) NPV $ 3111.81 Should the company make the purchase? Yes