show steps to solve it

In another game at Bonehead Casino in Reno, the player draws one card from a standard deck. If it is an A, K, then the player wins $903; a Q, 7, then the player wins $802; an 8 then the player wins $501; anything else, then the player loses. It costs $300 to play (for each play). Now, Melvin plays the game 80,000 times, Rufus plays the game 900,000 times. Find the probability that (a) Melvin makes $4,000 or more. (b) Rufus makes $1,485,000 or more