Austin and erin are willing to pay $10 and $9, respectively, for a ticket to a screening of a new movie. what is the total consumer surplus for both austin and erin if the market price of a ticket is $6?
a) $4
b) $7
c) $9
d) $19

You are evaluating two different silicon wafer milling machines. the techron i costs $285,000, has a three-year life, and has pretax operating costs of $78,000 per year. the techron ii costs $495,000, has a five-year life, and has pretax operating costs of $45,000 per year. for both milling machines, use straight-line depreciation to zero over the project’s life and assume a salvage value of $55,000. if your tax rate is 24 percent and your discount rate is 11 percent, compute the eac for both machines.

Mr. drucker uses a periodic review system to manage the inventory in his dry goods store. he likes to maintain 15 sacks of sugar on his shelves based on the annual demand figure of 225 sacks. it costs $2 to place an order for sugar and costs $1 to hold a sack in inventory for a year. mr. drucker checks inventory one day and notes that he is down to 9 sacks; how much should he order?

In the market for lock washers, a perfectly competitive market, the current equilibrium price is $5 per box. washer king, one of the many producers of washers, has a daily short-run total cost given by tc = 190 + 0.20q + 0.0025q2, where q measures boxes of washers. washer king's corresponding marginal cost is mc = 0.20 + 0.005q. how many boxes of washers should washer king produce per day to maximize profit?