Ok yes the Actex Manual has the solution, but I don't understand the solution so i would appreciate some assistance. Here is the question:

A carnival Sharpshooter game charges $25 for 25 shots at a target. If the shooter hits the bullseye fewer than 5 times then he gets no prize. If he hits the bullseye 5 times he gets back $10. For each additional bullseye over 5 he gets back an additional $5. The shooter estimates that he has a .2 probability of hitting the bullseye on any given shot. What is the shooter's expected gain if he plays the game (nearest $1)?

Ok they set up the Expected prize as

E(5x-15) + 15.p(0) + 10.p(1) + 5.p(2) + 0.p(3) - 5.p(4)

why is 5.p(4) subtracted???