Maggi and Alliya sell biscuits and cheese at a shop. Biscuits sell for $ 1.00, foot long biscuits sell for $ 2.00 and cheese sell for $ 2.50. Suppose biscuits make up 40 % of the sales, foot long biscuits make up 30 % of the sales and cheese make up 30 % of the sales. If the number of sales is Poisson distributed with parameter λ = 1000. find the expected value and variance of the revenue that Maggi and Alliya take in during a game.
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