Part of the fundamental financial analysis of any company, investment security, or business project entails the computation of cash flows. This is typically done in a cash flow template Excel spreadsheet which is pre_built for the purpose. The reason for this is that this type of template is not a simple calculator you build on the fly with little effort. It requires a lot of thinking, organizing the spreadsheets and formulas, and some planning about how to model cash in and cash out for each potential investment. In other words, there is no cookie cutter approach because each potential investment has different profit and loss drivers.
Creating your own word press template is a difficult job especially if you are still a beginner. Luckily, there are tons of ready_made WordPress templates available in the internet. You can download and save them for your internet projects. Nevertheless you must learn and master the skills of creating your own WordPress templates. Why hire a web designer for your page if you can do it all by yourself?