Estimate a venture's terminal value based on the following information: current year's net sales $=$ $$500,000$; next year's expected cash flow $=$ $$16,000$; constant future growth rate $=10\%$; and venture investors' required rate of return $=20\%.$

a$.$ $$285,714$

b$.$ $$150,000$

c$.$ $$160,000$

d$.$ $$200,000$

Please provide me with the equation for the BA$2$ Plus calculator method.