What we know: A dozen costs 1.32; there are 12 in a dozen. What we need to know: How much a restaurant makes selling 1 egg at 0.99. First, find the value of one egg; you can do that by dividing the total cost (1.32) by the amount (12): 1.32 / 12 = 0.11 <-- The cost per egg is 11 cents. To find the profit of the restaurant, just subtract the cost from the price they sell it for: 0.99 - 0.11 = 0.88 <-- The profit the restaurant makes per egg is 88 cents.