CFA Question: GlaxoSmithKline Plc is examining the economic feasibility of developing a new medicine. The initial investment in Year $1$ is $$500$ million. The investment in Year $2$ is $$200$ million. There is a $50$ percent chance that the medicine will be developed and will be successful. If that happens, GlaxoSmithKline must spend another $$100$ million in Year $3,$ but its income from the project in Year $3$ will be $$500$ million, not including the third$-$year investment. In Years $4,5,$ and $6,$ it will earn $$400$ million a year if the medicine is successful. At the end of Year $6,$ it intends to sell all rights to the medicine for $$600$ million. If the medicine is unsuccessful, none of GlaxoSmithKline$$s investments can be salvaged. Assume that the market return is $12$ percent, the risk$-$free rate is $2$ percent, and the beta risk of the project is $2\mathrm{.}3.$ All cash flows occur at the end of each year.

Calculate Net Present Value. Please solve using a Financial Calculator WITH STEPS and what buttons to input. The answer is given as $-$$$147\mathrm{.}07$milllion however when I input using Financial Calculator I get $-$$$183$million which is wrong.