We currently have a store where we are promoting a coupon code discount. The customer must purchase 2 shirts and use the coupon code to get a specific shirt for free.
There are 3 very important factors:
1) They must have at least 2 shirts in the shopping cart.
2) They must use the coupon code.
3) The free shirt is a specific shirt, not a buy one get one deal.
I assume we can pull this off with JSON. Can someone help me please? Thank you in advance.