The interaction of individual choices because a type of fish is on the verge of extinction, the government imposes rules that prohibit fishing in the publicly owned spawning grounds. at first, owners of fishing boats complain about this restriction on where they can fish, but soon they notice that the number of adult fish swimming outside the protected area is much higher than it was before. with the restriction, each fishing boat ends up catching more fish than it did before the restriction was in place. which of the following principles of economic interaction best describes this scenario?
a. markets allocate goods effectively
b. when markets do not achieve efficiency, government intervention can improve overall welfare.
c. markets usually lead to efficiency.
d. there is a tradeoff between equality and efficiency.

Kubin company’s relevant range of production is 18,000 to 22,000 units. when it produces and sells 20,000 units, its average costs per unit are as follows: average cost per unit direct materials $ 7.00 direct labor $ 4.00 variable manufacturing overhead $ 1.50 fixed manufacturing overhead $ 5.00 fixed selling expense $ 3.50 fixed administrative expense $ 2.50 sales commissions $ 1.00 variable administrative expense $ 0.50 required: 1. for financial accounting purposes, what is the total amount of product costs incurred to make 20,000 units? 2. for financial accounting purposes, what is the total amount of period costs incurred to sell 20,000 units? 3. for financial accounting purposes, what is the total amount of product costs incurred to make 22,000 units? 4. for financial accounting purposes, what is the total amount of period costs incurred to sell 18,000 units?