How do they work discounts in PrestaShop?
The price of the product can be changed by these discounts/surcharges:
A Catalog >> Attribute combination >> Impact on price (amount with tax)
B Catalog >> Prices >> Specific price
C Group >> Reduction (percent, if this is the default customer's group)
These discounts/surcharges are calculated in order displayed. These calculations take effect on the price of the product display.
For example, if discount is 10% at any point: Price * 0.9 * 0.9 * 0.9 = Price * 0.0.729
The M4 Supplier (or Whatever) Discount or Surcharge is classified as point D in the chain of the price calculation.
When using the module, watch out for restrictions:
- Don't use built-in discount for a group. Set discount directly in this module.
- Don't use built-in ecotax. This module is not compatible with ecotax.
- Don't use more M4 *Discount modules at once.
The important thing is a default customer's group.
Since the discounts/surcharges in the module are set for the group of customers, in cases of conflict is counted with those defaults.
The second category of discounts are vouchers. They are to be applied to the cart.