New to tea... I just bought 1/4 lb of my favorite green, how many cups should this last me?

Been going to the same coffee/tea shop for six months, love their green dragonwell. So when I got a french press for Christmas I figured now is the best time to get it for home.. bought 1/4 lb of it. But I'm not sure how many cups it'll last, some sites say 50 cups, but it's recommended at 1 tablespoon per 8oz cup.

Just wondering how long this should last me?