If the current situation exist with: Best Case NPV $600 with a Probability of .5, Worst Case NPV -$1,000 with a Probability of .2, and a Likely Case of NPV $300 with a Probability of .3 an abandonment option that could change the Worst case NPV to -$300 what is the value of the option at least: Would it be $470, $330, $190 or $140?
Please show me the steps of how you solve this.