My brain hurts

Ow. Why does my brain hurt? Because I just spent the last 5 minutes figuring out how long Lulu's new bag of dog food is going to last.

The bag of food is 8 pounds. She eats 1/2 cup of food a day (yes, the vet says that's plenty since she also gets treats). So if 1 pound = 16 ounces and 1/2 cup = 4 ounces then the bag of food should last 32 days. Right?

16 x 8 = 128

128/4 = 32

ow ow ow

I'm having flashbacks to school now.