Worldwide annual sales of a device in 201272013 were approximately 1; = 76p + 3,090 million units at a selling price of $p per unit. Assuming a manufacturing cost of $20 per unit, what selling price would have resulted in the largest annual prot? HINT [See Example 3, and recall that Profit = Revenue 7 Cost] (Round your answer to two decimal places.) 0 = $ |:l What would have been the resulting annual profit? (Round your answer to the nearest whole number.)