4-. During the summer months a college student makes and sells necklaces on the beach. Last summer he/ she sold the necklaces for $10 each, and his/ her sales averaged 20 per day. When the student increased the price by $1, he/ she found that the average decreased by 2 sales per day. If the material for each necklace costs $6, What should the selling price be to maximize the daily prot? What is the maximum daily prot? A: $13 per necklace for $98 in prot 5. An ofce supply company sells a: permanent markers per year at $p per marker. The price-demand equation for these markers is p = 10 00013:. The total annual cost of man- ufacturing :1: markers is C(22) = 5, 000 + 2:5. a) What price should the company charge for the markers to maximize revenue? What is the maximum revenue? A: $25,000 at $5 each b) How many markers should be produced to maximize prot? At what price to charge per marker? What is the maximum prot? A: 4,000 at $6 each for $11,000 6. The price-demand equation for a quantity :2: of a product at price p, in dollars, is p = 6:3 + 2400. If the xed cost is $15 and the variable cost is $5 to produce one unit. a) Find the profit function in term of 3:. b) What production level maximize the company prot? c) What is the maximum prot