I've had this solar calculator since I was in college. I probably bought this in 1980 and I still use it every single day, but not for the scientific functions. I use it for adding, subtracting, multiplying, and dividing, which coincidentally is ALL my first calculator would do. That first one was a Christmas gift from my dad around 1973. He paid $50 for it. I think businesses give them away now as marketing gimmicks.
But what's up with this display? I went out for lunch, came back and found this.