Efficiency in a market is achieved when:. a. a social planner intervenes and sets the quantity of output after evaluating buyers' willingness to pay and sellers' costs.
b. the sum of producer surplus and consumer surplus is maximized.
c. all firms are producing the good at the same low cost per unit.
d. no buyer is willing to pay more than the equilibrium price for any unit of the good.

Jamie lee is reviewing her finances one month later. she has provided the actual amounts paid below. use the cash budget table below to her identify the variances in her budget. each answer must have a value for the assignment to be complete. enter "0" for any unused categories. actual amounts income: monthly expenses: gross monthly salary $2,315 rent obligation $260 net monthly salary $1,740 utilities/electricity $130 savings allocation: utilities/water $10 regular savings $130 utilities/cable tv $155 rainy-day savings $20 food $160 entertainment: gas/maintenance $205 cake decorating class $90 credit card payment $25 movies with friends $50 car insurance $75 clothing $145 budgeted amounts assets: monthly expenses: checking account $1,850 rent obligation $225 emergency fund savings account $4,300 utilities/electricity $75 car $5,200 utilities/water $35 computer & ipad $1,100 utilities/cable tv $120 liabilities: food $115 student loan $6,600 gas/maintenance $95 credit card balance $1,000 credit card payment $45 income: car insurance $45 gross monthly salary $2,155 clothing $45 net monthly salary $1,580 entertainment: savings allocation: cake decorating class $90 regular savings $130 movies with friends $50 rainy day savings $20

University car wash built a deluxe car wash across the street from campus. the new machines cost $219,000 including installation. the company estimates that the equipment will have a residual value of $19,500. university car wash also estimates it will use the machine for six years or about 12,500 total hours. actual use per year was as follows: year hours used 1 3,100 2 1,100 3 1,200 4 2,800 5 2,600 6 1,200 prepare a depreciation schedule for six years using the following methods: 1. straight-line. 2. double-declining-balance. 3. activity-based.

In a perfectly competitive market, the long-run market supply curve tends to be horizontal or nearly so. what is another way to state this fact? (a) market supply is much more elastic in the long run than the short run. (b) in the long run, average total cost is minimized. (c) in the long run, price equals marginal cost. (d) market supply is much less elastic in the long run than the short run.