Problem Description

I am in the process of creating a clone of Manifold Market, a trading system, and I'm seeking a JavaScript equation that accurately calculates profits. However, the equation must work seamlessly even when certain variables, such as loans, are excluded from the calculation. Alongside this equation, a comprehensive explanation of the impact of excluding these variables on profit calculation is required.

Acceptance Criteria

To successfully complete this bounty, you must fulfil the following criteria:

Equation Development: Devise a JavaScript equation capable of calculating profits accurately within the Manifold Market's trading system. The equation should be designed to function without factoring in specific variables like loans.

Excluded Variables Explanation: Provide a detailed explanation of the excluded variables and their typical role in the profit calculation process. Describe how these variables interact with the equation and clarify the scenarios in which they are normally involved.