Is "caring" something that can be measured? And if so, what would you measure it in? The Richter scale, like the intensity of an earthquake? Or Decibels, like how loud I get opening Christmas presents? I venture that it can, and that the basic unit of caring is the Peanut Butter and Jelly Sandwich!
A friendly nod in the hallway between classes? That's 0.05 Peanut Butter and Jelly Sandwiches. An hour-long call after a break-up? Four PB&Js, easy! Donating a kidney to your best buddy is probably around ten thousand! But most people don't need your organs, just a hug and maybe someone to fix them a familiar snack. That snack? You're looking at it! 10 squishy inches of the sign you care. All new polyester fiber, ages 3 and up only!