One of your teachers raises chinchillas and is one of the top breeders in the state. At any time they can have as many as 15 chinchillas and as few as 7. Chinchillas have special needs to help simulate their natural habitat. Below are just a few things that a chinchilla needs in a week to be comfy and cozy:
Kiln Dried Pine for their bedding ~ $4.00
Alfalfa Hay for food ~ $6.00
Chinchilla Pellets ~ $3.00
Cheerios for treats (optional) ~ $2.00
How many chinchillas is your teacher probably taking care of right now (not 10), and how much is costing him/her to take care of them for one week? How many $100 bills would your teacher pay with for these supplies, and what would his/her change be?