add fixed income

[codehangen]

Problem Statement Some people who invest have to pay for specialized programs to calculate a fixed income

Evidence or User Insights I have to calculate a fixed income for specific government bonds and I would like to have this feature in the calculator.

Proposal will solve the problem because I will get more efficient in my job, and we can even calculates fixed income offline

Goals users who want to know how to invest can calculate fixed income bonds

Non-Goals None

Low-Fidelity Concept you need to know mathematics and economy management

Requested Assignment A coder who have free time

Concept

image-description as we can see on the website and app rendafixa or "fixed income" - we can see which is the best fixed income bond comparing the financial return with the specific time: savings vs lci/lca vs cdb / rdb. So... and each country has a specific name for fixed income or title of fixed income

I'm just suggesting this idea. I don't want to implement it.