Select the scenario that best describes an increase in total factor productivity as it relates to workers. a. With the updating of new software, the billing department can process more bills for clients in less time. b. With the updating of new work schedules, the billing department now can process bills for clients seven days a week. c. With the addition of 10 new workers, the billing department is able to increase its output, which is processing bills for clients. d. With the addition of 10 new computers, the billing department is able to hire more workers to process bills for clients.

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500