How to apply sale % on specific collection as a whole?

[AlKhaleejClinic]

Hi, i want to apply sale % cut on specific collections.

For example:
At Collection A, I want to apply 10% sale.
At Collection B, I want to apply 20% sale.
& so on. 

So, All products associated with that collection will get respective sale%.

Also, it must show cut price on product price. i.e. before & after.

something like:
Rs. 2000  Rs. 2200

How to achieve, please guide? Please keep in mind I dont want to change every product sale price as there are thousand of products on single collection that is going on a sale.

PLEASE HELPPPPP !!!!

[JHKCreate]

Hi @AlKhaleejClinic 

You would need an app to to that, for this I recommend Ablestar Bulk Product Editor – Ecommerce Plugins for Online Stores – Shopify App Store

You can pick by collection and do the discount and compare at price in bulk, Cheers!

[AlKhaleejClinic]

Hi, I checked the app, but its paid. Is there any free app? PLEASE UPDATE !!!

[AlKhaleejClinic]

Can I do it PROGRAMMATICALLY?

For example:
At Collection 'Medicine', I want to apply 10% sale.
At Collection 'Baby Care', I want to apply 20% sale.
& so on. 

So, All products associated with that collection will get respective sale%.

Also, it must show cut price on product price. i.e. before & after.

something like:
Rs. 2000  Rs. 2200
10% Discount

WHAT I HAVE DONE SO FAR?

{% if collection.handle == ‘Medicine’ %}
[CODE FOR SHOWING PRICE DISCOUNT]
{% endif %}

BUT ITS NOT WORKING & not showing [CODE FOR SHOWING PRICE DISCOUNT] prompt so I can code further for price cut. WHAT SHOULD I DO??
I am using EMPIRE Shopify Theme by PixelUnion.