Angelique runs a business making cell-phone cases. She started her business making custom 3-D printed cases. To make those she must pay a fixed cost of $ 48 to use the library's 3-D printer along with a per-unit cost of $6 for the plastic and the time to design and print the cases. Angelique is considering purchasing a plastic mold to make the cases instead. The mold would cost $ 88 up front, but once she has purchased it her per-unit cost drops to $4. Assume that the mold will last for one month. 1. What is the smallest number of cell-phone cases Angelique needs to produce to make purchasing the plastic mold worthwhile?
If Angelique expects to produce 22 cell-phone cases over the next month, which production method should she use?
A. 3-D printing
B. plastic mold
C. Neither; she should shut down production.
D. She is indifferent; the average cost is the same.

Susie buys two goods - rounds of golf and massages. suppose that the price of a round of golf is $20, and the price of a massage is $30. in a typical week susie will play two rounds of golf, getting 20 units of satisfaction from the second round. she normally buys three massages each week, with the third giving her 30 units of satisfaction. if she were to buy a fourth massage in a week, it would give her 20 units of satisfaction. if the price of massages is reduced to $15, which of the following outcomes might we expect to occur? a) susie would leave her consumption choices unchanged because of diminishing marginal utility in the consumption of massages. b) susie would buy more massages and more rounds of golf, as predicted by the substituion effect. c) susie would buy more massages and fewer rounds of golf, as predicted by the substitution effect. d) susie would buy more massage and fewer rounds of golf, as predicted by income effect.