3. A code used by an ice cream store to order its products is 12DRM215-220. This code is deciphered in this manner: 12 stands for the count of items in the box, DRM stands for Dreamcicles (a particular kind of ice cream novelty), and 215-220 indicates the entire class of low-fat products carried by the distributor.

a. What kind of code is used? Describe the purpose behind each part of the code (12, DRM, 215-220).

b. Construct a coded entry using the same format and logic for an ice cream novelty called Pigeon Bars, which come in a 6-count package and are not low-fat.

c. Construct a coded entry using the same format and logic for an ice cream novelty called Airwhips, which come in a 24-count package and are low-fat.