What are the expected winnings

Question

A contest at a fast-food restaurant offered the following cash prizes and probabilities of winning on one visit when a customer buys an order of French fries for
$ 1.63 Find the expected winnings if the player buys 28
orders of French fries in multiple visits.
Prize Probability
$100,000             1/8,504,860
$50,000               1/302,500
$10,000               1/282,735
$1,000                 1/153,560
$100                    1/104,560
$25                      1/9,540
What are the expected winnings if the player buys 28 orders of French fries on multiple visits?

Answer 1

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https://www.wyzant.com/resources/files/511539/what_are_the_expected_winnings