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I have a page where the user can purchase a digital product by itself, in a three pack, or in a five pack. The complicated part is that the user may also purchase add-ons for the products in the pack, but in a separate quantity.
eg. The user may want to buy a 5 pack of the base product, but only 2 add-ons.
Is there some design pattern that solves this problem? Is there a better way of illustrating this?
I'm stumped ..
Domain buying websites have had this add on functionality for years and could help you identify a reusable pattern that applies to your scenario.
Your design doesn't seem wrong ( considering we do not know the exact items and their addons )
I think one potential solution is not to separate the input process for the products and the add-ons, but rather combine them either in the input or the review stage so that the user actions are reflected immediately rather than waiting until the review/summary of the checkout process.
You can browse for examples on e-commerce sites where a product is specified and any additional add-ons are also displayed next to or below the item.
I don't think you have to worry about the users getting things wrong if you make it consistent and clear plus provide easy ways to change the input values.
