Annies Homemade own a 6-quart batch freezer and a 24-quart batch freezer. Each 6-quart batch of ice cream takes 30-minutes to mix, process, and store, while providing 20 customer servings. Each 24-quart batch of ice cream takes 40-minutes to mix, process, and store, while providing 80 customer servings. The manager who makes the ice cream is paid $20 per hour.

1. For each 6-quart batch of ice cream: a. What is the labor cost per batch? b. What is the average labor cost per serving?
2. For each 24-quart batch of ice cream: a. What is the labor cost per batch? b. What is the average labor cost per serving?