On Monday, Jeff bought a ticket to the Big Game for $40. On Wednesday, another friend offered him six tickets, each for the remaining home football games for $80, but Jeff was able to negotiate him...

On Monday, Jeff bought a ticket to the Big Game for $40. On Wednesday, another friend offered him six tickets, each for the remaining home football games for $80, but Jeff was able to negotiate him down to $60. Which of the following statements must be true?

a. On Monday, Jeff's PIBP for the Big Game ticket was at least $40.

b. On Monday, Jeff's PIBP for all seven home game tickets was at least $100.

c. On Wednesday, Jeffs PISP for the remaining six home game tickets was at most $60.

d. On Wednesday, Jeffs PIBP for each ofthe remaining six home game tickets was at least $ 10.