After entering Halgita, go straight up the small flight of stairs then turn right. Continue down this hallway until there is a short hallway to your left. After entering the small hallway you shoudl see Balbagan, the shop (Lively Shopkeeper) is after him on the left. Here you can buy two of the items (Sliced Rare Salmon x1 and Pieria Mushroom x3) needed for the cooking upgrade quest which leads the the Creme de la Creme achievement.