Net Present Value analysis of proposed strategys new cash flow and EPS/EBIT analysis

NOTE: To construct the first cash flow (cf₁) at the very minimum, the new revenue from your strategy(s) must be discounted back to the present value by calculating EBIT and that figure will be your cf_n for each year. cf₀ (initial cost of your strategy), cf₁ (discounted cash flow first year), r (opportunity cost of capital, the rate of the next best alternative use of cash/debt/equity resources).

This is the information I received. I am unsure how to figure out the cost of capital or initial cost.