You are building a financial calculator on Excel, it should be colorful, with bu

You are building a financial calculator on Excel, it should be colorful, with buttons and it should show instructions for what should the user do ,the calculator should be visible and presentable ,please indicate on the first worksheet what did you do so that I can prepare for the presentation, I should be able to put in values and it should be able to display an output of a correct answer
Important Info

The order was placed through a short procedure (customer skipped some order details).
Please clarify some paper details before starting to work on the order.

Type of paper and subject
Number of sources and formatting style
Type of service (writing, rewriting, etc)