4 ms·I'm pretty sure I learned demand adjusted pricing from lemonade stand in 1987.by pcarolan 12y agoI'm pretty sure I learned demand adjusted pricing from lemonade stand in 1987.fmsf 12y agoAh! But you weren't doing it on a computer, that is innovation!pcarolan 12y agosadly I was http://en.wikipedia.org/wiki/Lemonade_Stand http://en.wikipedia.org/wiki/Lemonade_Stand