Final answer:
Short run: Dismal sales causing donut shops to exit. Long run: Mrs. Meadows asks for overtime and Newton Bros. opens a new store. Neither: Purpleberry Frozen Custard's costs.
Step-by-step explanation:
Short run: Because of dismal sales last year, half of the city's donut shops exit the industry. This is a period of time during which a firm is unable to increase or decrease its amount of capital.
Long run: In order to produce more cookies, Mrs. Meadows asks her third shift to work overtime. Newton Bros. Bagels opens a new store on the other side of town. This lasts at least six months but no longer than one year.
Neither: Purpleberry Frozen Custard has $11,000 of fixed costs and $45,000 of variable costs.