little bit as I said like busy in a foreign country and if you visit many foreign countries is not very hard to get outsmarted on a price and you think that's a good deal no it's not you just can't keep track is fast enough the only 30 day change  thing is when you visit foreign country you're used the dollars now they've added one more thing to the mix the pace or whatever well suppose you visit a foreign country for that there are thousands a different items and they can just value things inters of anything it's very easy for you to become overwhelmed there's a formula for this the number I love

http://www.optimalstackfacts.org/30-day-change/