I understand that you want to calculate the payback period and net present value (NPV) for two projects, "project innovation" and "project improvement," to advise Gold Dust Ltd on which project they should invest in. However, you haven't provided the specific financial data (initial investment, cash flows, etc.) for each project. To perform the calculations, I would need the following information for each project:
- Initial investment for each project.
- Expected cash flows for each year of the project's duration.
- The salvage value or final cash flow at the end of the project.
- The current cost of capital or discount rate (which you've mentioned is 15%).
Once I have this information, I can help you calculate the payback period and NPV for both projects and provide advice on which project Gold Dust Ltd should invest in based on the calculated results. Please provide the relevant financial data for both projects so that I can assist you further.