You evaluate a vendor bid of $350. There is 65% probability that vendor will be behind schedule costing 125 and 35% probability of
doing early with a savings of 50. What is the total value of final bid

63.750
286.250
448.75
413.75

413.750 is shown as correct answer. But Im getting it as  negative - 413.75, considering 350 as outflow.

 Please explain how to get the correct answer?