Hi I need help with this accounting work, thank you!

BSU Inc. wants to purchase a new machine for $35,700, excluding $1,100 of installation costs. The old machine was bought five years ago and had an expected economic life of 10 years without salvage value. This old machine now has a book value of $2,000, and BSU Inc. expects to sell it for that amount. The new machine would decrease operating costs by $8,000 each year of its economic life. The straight-line depreciation method would be used for the new machine, for a six-year period with no salvage value. (Refer the below table)

(n) Payments 4% 5% 6% 7% 8% 9% 10% 11% 12% 15% 86957 .96154 .95238 .94340 0.93458 .92593 1.78326 .91743 .90909 .90090 .89286 1.88609 1.85941 1.83339 1.80802 1.75911 1.73554 1.71252 1.69005 1.62571 2.77509 2.72325 2.67301 2.62432 2.57710 2.53130 2.48685 2.44371 2.40183 2.28323 4 3.62990 4.45182 3.54595 3.46511 3.38721 4.10020 3.31213 3.23972 3.16986 3.10245 3.03735 2.85498 4.32948 4.21236 3.99271 3.88965 3.79079 3.69590 3.60478 3.35216 4.91732 4.48592 4.35526 6. 5.24214 5.07569 4.76654 4.62288 4.23054 4.11141 3.78448 6.00205 5.78637 5.58238 5.38929 5.20637 5.03295 4.86842 4.71220 4.56376 4.16042 6.20979 8. 6.73274 6.46321 5.97130 5.74664 5.53482 5.33493 5.14612 4.96764 4.48732 7.43533 7.10782 6.80169 6.51523 6.24689 5.99525 5.75902 5.53705 5.32825 4.77158 10 8.11090 7.72173 7.36009 7.02358 6.71008 6.41766 6.14457 5.88923 5.65022 5.01877 11 8.76048 8.30641 7.88687 7.49867 7.94269 7.13896 6.80519 6.49506 6.20652 5.93770 5.23371 7.53608 12 9.38507 8.86325 8.38384 7.16073 6.81369 6.49236 6.19437 5.42062 13 9.98565 9.39357 8.85268 8.35765 7.90378 7.48690 7.10336 6.74987 6.42355 5.58315 9.89864 6.98187 14 10.56312 9.29498 8.74547 8.24424 7.78615 7.36669 6.62817 5.72448 15 11.11839 10.37966 9.71225 9.10791 8.55948 8.06069 7.60608 7.19087 6.81086 5.84737 8.85137 9.12164 9.44665 16 11.65230 10.83777 10.10590 8.31256 7.82371 7.37916 6.97399 5.95424 10.47726 17 12.16567 11.27407 9.76322 8.54363 8.02155 7.54879 7.11963 6.04716 18 12.65930 11.68959 12.08532 10.82760 10.05909 9.37189 8.75563 8.20141 7.70162 7.24967 6.12797 7.83929 7.36578 6.19823 19 13.13394 11.15812 10.33560 9.60360 8.95012 8.36492 20 13.59033 12.46221 11.46992 10.59401 9.81815 9.12855 8.51356 7.96333 7.46944 6.25933 Determine the cash payback period. (Round cash payback period to 1 decimal place, e.g. 10.5.) Cash payback period years