Clark Company estimated the net realizable value of its accounts receivable as of December 31, 2019, to be $167,000, based on an aging schedule of accounts receivable. Clark has also provided the following information: The accounts receivable balance on December 31, 2019 was $177,400. Uncollectible accounts receivable written off during 2019 totaled $12,200. The allowance for doubtful accounts balance on January 1, 2019 was $15,400. How much is Clark's 2019 bad debt expense

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