Build a catalog price rule

[erik_chan]

I want to build a catalog price rule

Customer chose a item in category A.
Whe customer choose cateory B item. All item in Category B can take 30% off discount

How can I set it?

Thanks

[nisha_jangid]

Hello @erik_chan

As the rule you want to apply is not possible by magento admin panel. If you want to apply this you have to do this programmatically by coding which will calculate discount on checkout according to required condition. 

If issue solved,Click Kudos & Accept as Solution

[RisBan · Accepted solution]

Hi erik_chan,

nisha_jangid is right however you can set up "Shopping Cart Price Rules" and effect outcome on a cart for the customer.
this an only way without custom programming.

You might need to do more tweaking to get what you want.

I hope that will help in any way

[erik_chan]

Thanks, you are so great