Recommendations for a calculator with perma-memory and text features?

I just want a calculator that has 1. permanent memory, 2. I can pin certain numbers to stay at the top of memory and 3. I can make small text comments on the numbers stored in memory.

I don't need anything over the top, just something with a clean interface to help me keep track of a tally as I add/ subtract from the number over time. TIA!