$193.06
My grandmother has dementia, she's had it for several years. She takes medicine for it and it hasn't gotten worse. She is one of the smartest people I know ( smarter than me) and despite her health problems she is still quick witted. For instance, I take care of my grandparents' bills. My grandfather asked me the sum- well, the conversation went something like this: Grandfather: " Lisa, how much are they?" Me: "Hold on, I'm still figur..." Grandmother: " $193.06" That's right, she had the sum calculated in her head in under a minute, while I was still going "Now, I need to carry the one.."