Change Product Group Prices If Product From Another Product Group Selected

Is there an way to change the prices of the products in one product group based on whether an item from another product group is selected? For example, an 8x10 is $12, but if Package A is ordered an additional 8x10 is $10. The Ala-Carte price (the 8x10 by itself) is $12; the Add-On price (the 8x10 is ordered in addition to Package A) is $10.

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There isn't a way to change the prices in the price list if something else has been purchase. But there is an option in collections/packages for Extra Photo and Extra New Photo. Using those options you can charge a different price when they are purchasing additional products that are in the collection.
https://www.picturespro.com/sytist-manual/articles/creating-collections-packages/

You can also add products using that feature that are not included in the collection:
https://www.picturespro.com/sytist-manual/articles/offer-additional-products-in-collections/

Edited by

Thanks Tim! While not ideal, this does seem to accomplish what I was looking for. I really was hoping for an Ala-Carte vs an Add-On option. Add-On products could only be added after a package has been ordered, and would be at a lower price than products in the Ala-Carte options. Same products, but Add-On items would be slightly less cost. Ala-Carte products could be ordered with/without a package. I think you get the drift...

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