A firm has an operating cash flow of $$20$ million. The firm$$s accountants project that net working capital will increase by $$1\mathrm{.}5$ million over the year. Additionally, the operations people are expected to dispose of $($sell$)$ $$800,000$ of used equipment and purchase $$1\mathrm{.}9$ million of new equipment. Based on these numbers, what is the firm$$s free cash flow? $$17\mathrm{.}4$ million $$20$ million $$16\mathrm{.}6$ million $$15\mathrm{.}4$ million $$22\mathrm{.}6$ million