Quick, Cheap Way To Find Out Your Blood Type?

The person who knows most about blood typing here is JPB.
Please don't just batter her with ordinary requests that can be answered elsewhere; I'm just saying she is knowledgeable re the intricacies. Leave her alone.

Don't take this post as license to bother her or I'll have to beat you up.

You didn't have to hit me that hard! I just looked at JPB, because she's a friend.

Made me laugh..

Did anyone else know that a certain population of Japanese believe that blood type holds the same significance as those who believe in astrology? I just found that out.