Went shopping with my mom for her "mother of the b...

Went shopping with my mom for her "mother of the bride" dress. Felt rushed, they were extremely impatient with my 9 year old who wasn't doing anything to warrant their frustration. Items were paired together yet we weren't told they were priced separately until we got to the register where they informed us that it would be an additional $100 on top of what we were paying for the dress even though the dress and matching jacket were shown to us as a set.
Very disappointed...