Product with manditory sub product question

[billk1556]

I would like to add additional products when a specific product is selected.

example:  when customer orders 6 blue shirts, then magento will add one blue cap. (one cap for every 6 blue shirts).

any thoughts?

Thank you in advance

[OST Agency]

May Be Special Promotions extension help you out for this.  Follow this link

https://amasty.com/special-promotions.html