Is there the ability to enter a custom amount for an item modifier within the cart? We have modifiers that the description is the same, but the cost of the modifier is different item to item. For example, people can adjust the cushion configuration for a sofa, but the cost to adjust to a bench cushion is different depending on the sofa. However, right now I can only find a way to set the cost of a modifier that applies the same across all items.
