Tankao makes earbuds for mobile devices. When Tankao produces 20 sets of earbuds, its average variable cost is $5 per set and its average total cost is $8 per set. Tankao's:

marginal cost is less than $3 per set.
marginal cost is equal to its average fixed cost.
marginal cost is $3 per set.
average fixed cost is $3 per set.

Bulldog holdings is a u.s.-based consumer electronics company. it owns smaller firms in japan and taiwan where most of its cell phone technology is developed and manufactured before being released worldwide. which of the following alternatives to integration does this best illustrate? a. venture capitalism b. franchising c. joint venture d. parent-subsidiary relationship