I have this requirement:
A product should have each individual price and case / package price.
For each product, N items make a case. For example: In product, A 20 items makes a case. In product B 5 items make a case.
When a user enters the quantity, the code should automatically check how many case can be purchased and how many individual product can be purchased.
For example: If a user types 125 quantity, it should automatically check the case product count (20 items in this case),
125 products can be purchased as 6 cases (20 items in a case) and 5 individual items.
I hope my comment is understandable.
Please refer to the image attached.
