Similar to adding an insurance surchargeto the shipping rate, one can provide a discount just by making the surcharge a negative amount.
In this example, we’ll use the “Shipping by weight” calculator for shipping, and set a discount of $2.99 if the cart’s total is $20 or more.
Order | Type | Name | Expression | Rate Expression | Surcharge Expression |
10 | Option | Shipping | true | Shipping.ByWeight | ([$SubTotalWithDiscounts] > 20) ? -2.99 : 0 |
As mentioned in prior blogs, the " ? : " is the ternary if-then-else operator. These can be chained together if needed - for example to have discounts based on amount like this:
Subtotal greater than | Discount |
100 | 7.99 |
50 | 5.99 |
20 | 2.99 |
Then the expression would look like
([$SubTotalWithDiscounts] > 100) ? -7.99 : ([$SubTotalWithDiscounts] > 50) ? -5.99 : ([$SubTotalWithDiscounts] > 20) ? -2.99 : 0
