Costco offers soft ice cream in a cup or a waffle cone. If you get it in a cup, you can add some toppings and you'll have yourself a sundae. Choices of toppings are hot fudge, caramel or Strawberry. Ice cream flavors include vanilla, chocolate and a swirl of chocolate and vanilla.
I normally go with a vanilla ice cream in a cup (no topping). This has to be one of my favorite soft ice cream. I would take this over the Dole version in terms taste and value. The Dole version at the PNE is priced at $5.00, while the Costco version is priced at $2.00.
If you haven't tried it yet, I recommend giving the Costco soft ice cream a shot.