Lucky strike mine (llc) purchased a silver deposit for $1,500,000. it estimated it would extract 500,000 ounces of silver from the deposit. lucky strike mined the silver and sold it reporting gross receipts of $1.8 million, $2.5 million, and $2 million for years 1 through 3, respectively. during years 1 - 3, lucky strike reported net income (loss) from the silver deposit activity in the amount of ($100,000), $400,000, and $100,000, respectively. in years 1 - 3, lucky strike actually extracted 300,000 ounces of silver as follows:

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