Re: 麻煩經濟達人解惑....

看板Economics (經濟學)作者blueoceaning (Maggie)時間17年前 (2009/03/29 23:35)推噓1(1推 0噓 2→)

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※ 引述《blueoceaning (Maggie)》之銘言： : ※ [本文轉錄自 B97303XXX 看板] : 作者: blueoceaning (Maggie) 看板: B97303XXX : 標題: 麻煩經濟達人解惑.... : 時間: Sat Mar 28 18:05:44 2009 : suppose beverage customers spend an average $4 on beverages with : an 80 percent gross margin, and food customers spend an average $5 on : sandwiches and salads with a 50 percent gross margin. : In both cases, gross magin is : simply price minus input cost and does not reflect variable labor and related : expenses. : Customer traffic throughout the day is as follows: : Hour of day Beverage customers Food customers Profit Contribution$ : 06.00--------- 150 -------------- 50 ------------- 605.00 : 07.00--------- 250 -------------- 100 ------------- 1050.00 : 08.00--------- 200 --------------- 75 ------------- 827.50 : 09.00--------- 175 --------------- 50 -------------- 685.00 : 10.00--------- 100 -------------- 25 -------------- 382.50 : 11.00--------- 200 --------------- 75 -------------- 827.50 : 12.00--------- 200 --------------- 175 --------------1077.50 : 13.00--------- 125 --------------- 150 -------------- 775.00 : 14.00--------- 75 --------------- 75 -------------- 427.50 : 15.00--------- 50 --------------- 50 -------------- 285.00 : 16.00--------- 100 --------------- 25 -------------- 382.50 : 17.00--------- 75 --------------- 50 -------------- 365.00 : 18.00--------- 50 --------------- 75 -------------- 347.50 : 19.00--------- 50 --------------- 25 -------------- 222.50 : 20.00--------- 25 --------------- 25 -------------- 142.50 : 21.00--------- 25 --------------- 10 -------------- 105.00 : 22.00--------- 25 --------------- 10 -------------- 105.00 : TOTAL 1875 1045 8612.5 : A.Assume labor, electricity, and other incremental costs are $175 per : hour of operation; : calculate the profit-maximizing hours of operation per day.z : B.Assume the store is open 365 days per year, and that incremental : rental costs are $2 million per year. Calculate optimal incremental : profit. Should Coffee store close this year? : 版主很抱歉,不熟悉板規不好意思補上個人想法 A. 依據MR=MC會到達利潤最大值而依據profit contributions的結果利潤最大的小時是12.00 的該單位若1077.5-175=902.5 極為該天利潤的最大時刻若導出函數=>利潤=-175+0.8Q1+0.5Q2 這樣對嗎? 是否還有畫圖形且算出斜率為零時利潤最大?? B. 8612.5-2975=5637.5 5637.5-5555.5=82 82*12=USD 984 所以可以繼續營運這樣對嗎?? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 219.84.184.129