Formula for net cash inflow of a project is:

Sales - Operating Expenses - Interest - Tax
Sales - Operating Expenses
Net Profit after tax + Depreciation
Gross Profit + Depreciation

The correct answer is: A. Sales – Operating Expenses – Interest – Tax

Net cash inflow is the amount of cash that a project generates after accounting for all expenses, including operating expenses, interest, and taxes. It is calculated by subtracting all of these expenses from sales.

Sales are the total amount of revenue that a project generates. Operating expenses are the costs associated with running the project, such as salaries, rent, and utilities. Interest is the cost of borrowing money to finance the project. Tax is the amount of money that the project owes to the government.

Net cash inflow is an important metric for evaluating the financial viability of a project. It is used to determine whether the project will generate enough cash to cover its expenses and make a profit.

Option B is incorrect because it does not include interest. Option C is incorrect because it does not include taxes. Option D is incorrect because it does not include operating expenses.