Dultmeier shipping cost

For the first time last week I ordered some fittings from Dultmeier, apparently they have $ 100 minimum which I have no problem with fulfilling, and then at the checkout page, I was asked method of shipping, I chose usps, my total order was a little over $ 100, like $ 102 or $ 103 and today my Amex is charged for $ 120+, I thought usps has priority mail flat rate box, it wasn't a boat load of fittings either, they mentioned it was "shipping and handling", may be it was the handling charge that I miscalculated ? I'm used to order through Jondon and they don't charge handling and my shipping is free with $ 350 minimum order, so paying 20% for s&h of $ 100 items kind of steep, does that mean if I order $ 300 worth of items, the s&h going to be $ 60 ? Did any of you ordered from them before and how did the s&h calculated ? Would it be cheaper with UPS ground ?
Before Mo say anything I'm not being cheap, just making a damn good financial business decision

I am lucky enough to drive down and pick everything up, so I have no experience with their shipping rates.

Give me a heads up next time Dp and I will pick it up and ship it out from here.

Thanks Rob, I appreciate that, I called them sometimes last year and got a quote for a cat pump and the shipping quote for that pump was about $ 30 ? That pump was heavy !
Next time I'll just call my order in and ask for shipping quote before finalizing the order.

There are some site that don't give you the shipping costs.

Hey DP to have to watch all of you expenses cause every dollars adds up 100s and the end of the year