Which calculation includes the amount brought in from sales, minus the cost of supplies and operating expenses?

The calculation that accurately reflects the amount brought in from sales, minus the cost of supplies and operating expenses, is net income. This figure represents the total earnings of a business after all expenses, including both operating expenses and the cost of goods sold, have been deducted from total revenue.

In detail, net income is critical as it provides a clear picture of a company’s profitability over a specific period. It indicates how much money a business retains after covering all of its operational costs and other expenses. This measure is often used by stakeholders, including investors and management, to evaluate the overall financial health and performance of the business.

While gross profit focuses specifically on revenues minus the cost associated with goods sold, and does not account for operating expenses, retail margin typically measures the difference between sales price and cost, representing profit margins without encompassing the full scope of expenses. Cost of goods sold is strictly the costs directly tied to the production of goods sold by the company, so it doesn’t include other operational expenses. Thus, net income provides the most comprehensive view of a company's profitability in this context.