【正文】 fit of the activity.C.number of units times the total benefit of the activity.D.extra benefit for one additional unit of the activity.75.You save $10 on gas every week since you live close to the bus stop. You have class five days a week. What is your average benefit per day for living close to the bus stop?A.$10B.$5C.$2D.$76.Your scholarship depends on your maintaining a cumulative GPA. Your GPA for last semester was , which brought your cumulative GPA down. What must be true?A.Your marginal grades (last semester39。s grades) were higher than your overall GPA.B.Your marginal grades (last semester39。s grades) were lower than your overall GPA.C.If this semester39。s grades are the same as last semester39。s, your overall GPA will stay the same.D.If this semester39。s grades are the same as last semester39。s, you might lose your scholarship.77.Refer to the table above. The average cost of 4 units of this activity is:A.$20B.$25C.$30D.$4078.Refer to the table above. The marginal cost of the 3rdunit of this activity is:A.$30B.$25C.$20D.$1079.Refer to the table above. The average benefit of 3 units of activity is:A.$80B.$60C.$40D.$2080.Refer to the table above. The marginal benefit of the 5thunit of activity is:A.$60B.$50C.$5D.$081.Refer to the table above. According to the costbenefit principle, the level of activity that provides the largest net benefit is:A.1B.3C.4D.682.Refer to the table above. The average cost of 5 units of activity is:A.$1B.$2C.$3D.$483.Refer to the table above. The marginal cost of the 4thunit of activity is:A.$1B.$2C.$3D.$484.Refer to the table above. The average benefit of 4 units of activity is:A.$4B.$5C.$6D.$1085.Refer to the table above. The marginal benefit of the 6thunit of activity is:A.$1B.$2C.$4D.$1086.Refer to the table above. According to the costbenefit principle, the level of activity that provides the largest net benefit is:A.1B.4C.5D.787.Refer to the table above. The total value of donations raised by three employees is:三名雇員的善款的總價值是：三名雇員的善款的總價值是：A.$43,899.B.$45,000.C.$48,911.D.$51,963.88.Refer to the table above. The total labor cost of 4 employees is:A.$21,500.B.$22,000.C.$38,000.D.$43,121.89.Refer to the table above. The President of What39。sAMatterU decides to hire fundraisers as long as the average benefit exceeds the average cost, resulting in __________ employees being hired and a net benefit (total donations minus total labor costs) of __________.A.5。 $17,080B.5。 $67,080C.4。 $60,000D.4。 $22,00090.Refer to the table above. The marginal benefit (extra donations) of the 2ndemployee is:A.$42,426.B.$21,213.C.$12,426.D.$11,337.91.Refer to the table above. The marginal labor cost (extra labor cost) of the 4themployee is:A.$9,500.B.$10,750.C.$11,000.D.$13,000.92.Refer to the table above. The Chairman of the Economics Department at What39。sAMatterU says that fundraisers should be hired as long as their marginal donations exceed their marginal labor costs. Following this criterion, __________ employees are hired and net benefits are __________. Refer To: 0192A.1。 $22,000B.2。 $25,426C.3。 $25,426D.2。 $3,47693.Refer to the table above. The net benefit of hiring fundraisers is largest when __________ employees are hired. Refer To: 0193A.4B.3C.2D.194.Ginger bought a phone that came with a $10 rebate. Ginger should fill out and mail in the rebate form if:A.the opportunity cost of the time and trouble of sending in the rebate form is less than $10.B.the opportunity cost of the time and trouble of sending in the rebate form is more than $10.C.she would have bought the phone without the rebate, and so sending in the rebate form involves no opportunity cost.D.Ginger39。s surplus from purchasing the phone was less than $10.95.Tony notes that an electronics store is offering a flat $20 off all prices in the store. Tony reasons that if he wants to buy something with a price of $50, that it is a good offer, but if he wants to buy something with a price of $500, it is not a good offer. This is an example of:A.inconsistent reasoning。 saving $20 is saving $20.B.the proper application of the costbenefit principle.C.rational choice because in the first case he saves 40% and in the second case he saves 4%.D.marginal cost equals marginal benefit thinking.96.Suppose a retail store was offering 10% off all prices on all goods. The incentive to take advantage of the 10% savings is:A.unrelated to the list price of one good.B.inversely related to the list price of the good.C.directly related to the list price of the good.D.independent of the list price.A firm employs Pam to assemble personal puters. Pam can assemble 1 puter if she works 1 hour, 4 puters in 2 hours, 8 puters in 3 hours, 10 puters in 4 hours, and 11 puters in 5 hours. Each puter consists of a motherboard that costs $200, a hard drive that costs $100, a case that costs $20, a monitor that costs $200, a keyboard that costs $60 and a mouse that costs $20. The cost of employing Pam is $40 per hour.97.What is the marginal cost of producing the puters Pam assembles during her 3rdhour of work?A.$1,200B.$1,240C.$2,400D.$2,44098.What is the marginal cost of producing the puters Pam assembles during her 4thhour of work?A.$1,200B.$1,240C.$2,400D.$2,44099.The firm sells each puter for $620. How many hours should the firm employ Pam to maximize its benefit from her employment?A.0 hourB.160