I$\text{'}$m especially stuck on part b

Herjavec Enterprises is thinking about introducing a new surface cleaning machine. The marketing department has come up with the estimate that the company can sell $20$ units per year at $$195,000$ net cash flow per unit for the next five years. The engineering department has come up with the estimate that developing the machine will take a $$14\mathrm{.}5$ million initial investment. The finance department has estimated that a discount rate of $11$ percent should be used.

aWhat is the base$-$case NPV$?($A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer in dollars, not millions of dollars, rounded to $2$ decimal places, e$.$g$.,1,234,567\mathrm{.}89.)$

b$.$ If unsuccessful, after the first year, the project can be dismantled and will have an aftertax salvage value of $$10\mathrm{.}4$ million. Also, after the first year, expected cash flows will be revised up to $30$ units per year or down to $0$ units with equal probability. What is the revised NPV$?($Do not round intermediate calculations and enter your answer in dollars, not millions of dollars, rounded to $2$ decimal places, e$.$g$.,1,234,567\mathrm{.}89.)$