Madam Malkin's Clothes for all Occasions. 

"Welcome. Hogwarts? Good. Just stand over there on that stool..."                  

Every-day Work Robes: Every color ,3 galleons each.

Dress Robes: Every color,7 galleons each.

Pointed hat: Every color,1 galleon each.

Gloves: Dragon hide, leather, balisik skin, 4 galleons each.

Invisibility Cloak: 300 galleons each.

Winter Cloaks: 1 galleon each.

Name Tags: 3 in a pack. 1 galleon a pack.