Auto Responder file?

I currently have a form with multiple items for purchase. Once the customer chooses which item(s) they'd like, I want the form sent to make payment (PayPal). Once payment is complete, they are sent an auto-responder based on the item(s) they purchased through the form. This auto-responder would have a zip folder.

Is there a way to create a condition within the form or auto-responder, so for example the customer buys item "A", the zip file named "A" gets sent to them. And if the next customer buys item "D", that zip file is sent to them, and so on.

The way to achieve that is to create multiple autoresponders. Each autoresponder has a different zip file attached.

For example:
Autoresponder 1 = A.zip
Autoresponder 2 = B.zip

You can then use email condition of what autoresponder you will send to your users based on their response.

Guide: 

- How-to-Send-Email-Based-on-User-s-Answer

- How-to-Attach-a-File-to-Autoresponder-Emails